A career in dermatology is still a safe bet for medical : GMAT Critical Reasoning (CR)
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# A career in dermatology is still a safe bet for medical

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CEO
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A career in dermatology is still a safe bet for medical [#permalink]

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10 Nov 2007, 12:03
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29% (02:28) correct 71% (01:52) wrong based on 23 sessions

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A career in dermatology is still a safe bet for medical school graduates. IN the U.S. the number of cases of skin cancer linked to ultraviolet UV sunlight has remained relatively constant every year even though far frewer adults are intentionally exposing themseleves to UV sunlight now than were doin so at the height of the suntan crazy 20 years ago.

Each of the folowing, if true, could explain the relative stability in the incidence of skin cancer each year despite the decrease in intentional exposure to UV sunglight EXCEPT:

A: Because of decreasing levels of ozone in the upper atmopshere, more people are now exposed accidentally to excessive UV sunlight

B: People who continue to intentionall expose themselves to UV sunlight are absorbing larger does of the harmful radiation than the average suntannder did in the past.

C: Levels of UV radiation from sources other than sunlight are increasing every year.

D: While fewere women are intentionally exposing themselves to UV sunlight, the number of men doing so has increased significantly.

E: In most victims, skin cancer is lined to exposures to UV sunlight that occured up to 30 years before the onset of the disease.
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CEO
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10 Nov 2007, 12:10
The answer is actually pretty easy to get. However, I wanted to point something out. This is a Kaplan CR so I guess ud expect to see something like this. While C does explain the increase in UV radiation, are we ONLY talking about UV radiation cases to sunlight. To me C seems irrelevant b/c UV radiation from other sources could go up by 100000%, but NOT affect the number of cases of skin cancer LINKED TO UV radiation in SUNLIGHT. C doesnt really explain how UV radiation linked to sunlight has remained stable.

C can explain how the number of ppl intentionally exposing themselves to sunlight has decreased. But doesnt explain the consistency w/ UV exposure to SUNLIGHT.

I guessed D, which is the OA, just b/c its Kaplan. D doesn't help the argument at all so its a better choice than C. However, I still think C is out of scope.
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12 Nov 2007, 08:50

A: yes..it explains that there is still some source through which people get exposed to UV rays..

B: yes...it shows intensity of medical medical problem which is increasing due to high exposure to UV rays and more money to doctors...

C: another reason....it makes conclusion stronger..

D: Does it matter??? Or is anything like that would strengthen argument...errr I don't think so...CORRECT CHOICE.

E: Yup...this would give further money to doctors....
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15 Jul 2011, 02:31
1
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1) Skin cancer caused by UV radiation.
2) Far fewer adults are INTENTIONALLY exposed to UV radiation today than they were 20 years ago.
3) Hence number of cases of Skin Cancer should reduce.

4 answer choices helps explain why. 1 answer choice will have no effect.

A: Because of decreasing levels of ozone in the upper atmosphere, more people are now exposed accidentally to excessive UV sunlight.
Accident exposure is high thereby causing more skin cancer. Helps in answering WHY. Eliminate

B: People who continue to intentionally expose themselves to UV sunlight are absorbing larger does of the harmful radiation than the average sun tanner did in the past.
More exposure means higher rate of cancer. Helps in answering WHY. Eliminate.

C: Levels of UV radiation from sources other than sunlight are increasing every year.
People are still exposed to higher sunlight from other sources thereby causing higher rate of cancer. Helps in answering WHY. Eliminate.

D: While fewer women are intentionally exposing themselves to UV sunlight, the number of men doing so has increased significantly.
Suppose previously 100 adults where exposing themselves to sunlight. Of 100, 50 were men and 50 were women. According to passage, now far fewer adults expose themselves intentionally. Let now there be only 70 adults who exposes to sunlight. Of that, number of women who exposes be 10 and number of men who exposes be 60. Hence now there is a significant number of men who exposes to sunlight than there are women. BUT overall only 70 adults expose to sunlight compared to 100 previously. With a cancer rate of 50% now you would expect only 35 to be having cancer than previously 50. Hence doesn't help us solve paradoxical question.

E: In most victims, skin cancer is linked to exposures to UV sunlight that occurred up to 30 years before the onset of the disease.
Helps explain why we still see a stable number of cancer patient. Because these patient have been exposed to sunlight 30 years ago. Eliminate.

OA D.
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15 Jul 2011, 05:28
Some good explanations thanks!
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15 Jul 2011, 18:27
D is a clear winner. It is totally out of scope as nothing is mentioned about incidence of cancer in men and women seperately.

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18 Jul 2011, 06:37
D is the only option which does not mention intentional UV exposure.
Re: CR- Dermatology   [#permalink] 18 Jul 2011, 06:37
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