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Chronic fatigue syndrome is characterized by prolonged fatigue, muscul

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Chronic fatigue syndrome is characterized by prolonged fatigue, muscul  [#permalink]

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New post 13 Apr 2019, 22:06
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Chronic fatigue syndrome is characterized by prolonged fatigue, muscular pain, and neurological problems. It is not known whether these symptoms are all caused by a single virus or whether each symptom is the result of a separate viral infection. A newly synthesized drug has been tested on those who suffer from chronic fatigue syndrome. Although the specific antiviral effects of this drug are unknown, it has lessened the severity of all of the symptoms of chronic fatigue syndrome. Thus there is evidence that chronic fatigue syndrome is, in fact, caused by one virus.

The argument assumes which one of following?

(A) All those who suffer from prolonged fatigue also suffer from neurological problems.

(B) It is more likely that the new drug counteracts one virus than that it counteracts several viruses.

(C) The symptoms of chronic fatigue syndrome are dissimilar to those of any other syndrome.

(D) Most syndromes that are characterized by related symptoms are each caused by a single viral infection.

(E) An antiviral medication that eliminates the most severe symptoms of chronic fatigue syndrome thereby cures chronic fatigue syndrome.

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Re: Chronic fatigue syndrome is characterized by prolonged fatigue, muscul  [#permalink]

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New post 13 Apr 2019, 23:32
KaranB1 wrote:
Chronic fatigue syndrome is characterized by prolonged fatigue, muscular pain, and neurological problems. It is not known whether these symptoms are all caused by a single virus or whether each symptom is the result of a separate viral infection. A newly synthesized drug has been tested on those who suffer from chronic fatigue syndrome. Although the specific antiviral effects of this drug are unknown, it has lessened the severity of all of the symptoms of chronic fatigue syndrome. Thus there is evidence that chronic fatigue syndrome is, in fact, caused by one virus.

The argument assumes which one of following?

(A) All those who suffer from prolonged fatigue also suffer from neurological problems.

(B) It is more likely that the new drug counteracts one virus than that it counteracts several viruses.

(C) The symptoms of chronic fatigue syndrome are dissimilar to those of any other syndrome.

(D) Most syndromes that are characterized by related symptoms are each caused by a single viral infection.

(E) An antiviral medication that eliminates the most severe symptoms of chronic fatigue syndrome thereby cures chronic fatigue syndrome.


CF characterisced by : (1) prolonged fatigue (2) muscular pain, and (3) neurological problems.
Info about symptoms ( 1 to 3 ) is caused by single virus/diff virus is not known.
The new drug has reduced all the symptoms - Hence the author concludes that chronic fatigue syndrome is, in fact, caused by one virus.

Try to negate option (B) the conclusion falls apart, hence correct Answer must be (B)
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Chronic fatigue syndrome is characterized by prolonged fatigue, muscul  [#permalink]

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New post 13 Apr 2019, 23:50
The conclusion is in the last sentence starting with conclusion marker "thus".
The conclusion is :- Chronic fatigue syndrome is ,in fact, caused by one virus.
Premise :- Newly synthesized drug has reduced all the symptoms of chronic fatigue syndrome.
Missing link :- It is more likely that the drug acts on only one virus.

Option B states that and hence is the correct answer.

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Re: Chronic fatigue syndrome is characterized by prolonged fatigue, muscul  [#permalink]

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New post 15 Apr 2019, 19:09
Read the below lines and you will reach to the conclusion.

Quote:
Although the specific antiviral effects of this drug are unknown, it has lessened the severity of all of the symptoms of chronic fatigue syndrome. Thus there is evidence that chronic fatigue syndrome is, in fact, caused by one virus.


One drug was tested on those who suffer from chronic fatigue syndrome. This drug lessened the severity of all of the symptoms of chronic fatigue syndrome.

From this the conclusion came out that chronic fatigue syndrome is caused by one virus.

We,now, can prethink that one drug that was given actually countered 3 problems of chronic fatigue syndrome in one or the other sense.

1. Either it acted on all 3 equally.
2. It acted on 1 and that 1 acted on other 2.

Option B highlights the 2nd point .

Therefore B is correct.
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Re: Chronic fatigue syndrome is characterized by prolonged fatigue, muscul   [#permalink] 15 Apr 2019, 19:09
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