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Most vaccines are derived from weakened or killed strains of

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Most vaccines are derived from weakened or killed strains of [#permalink]

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New post 25 Nov 2013, 21:02
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Most vaccines are derived from weakened or killed strains of the same virus that they prevent, unlike the derivation of smallpox vaccine from a different virus altogether.

(A) the derivation of smallpox vaccine from a different virus altogether

(B) smallpox vaccine, which is derived from a different virus altogether

(C) smallpox's vaccine, which gets derived from a different virus altogether

(D) when smallpox vaccine is derived from an altogether different virus

(E) the altogether different virus from which smallpox vaccine is derived
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Re: Most vaccines are derived from weakened or killed strains of [#permalink]

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New post 25 Nov 2013, 21:09
Hint:
What is the comparison? What is "unlike" what?

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Re: Most vaccines are derived from weakened or killed strains of [#permalink]

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New post 26 Nov 2013, 03:28
I think "smallpox's vaccine" is incorrect, because it seems to suggest that the vaccine "belongs" to "smallpox". This is obviously incorrect.
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Re: Most vaccines are derived from weakened or killed strains of [#permalink]

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New post 26 Nov 2013, 21:00
Most vaccines are derived from weakened or killed strains of the same virus that they prevent, unlike the derivation of smallpox vaccine from a different virus altogether.

(A) the derivation of smallpox vaccine from a different virus altogether

(B) smallpox vaccine, which is derived from a different virus altogether

(C) smallpox's vaccine, which gets derived from a different virus altogether

(D) when smallpox vaccine is derived from an altogether different virus

(E) the altogether different virus from which smallpox vaccine is derived

Unlike is always followed by a noun,so we can short list B and C, C is in correct because --smallpox's vaccine, which gets derived-- Vaccine dosent gets derived itself.
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Re: Most vaccines are derived from weakened or killed strains of [#permalink]

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New post 20 Nov 2014, 02:45
"Vaccine of smallpox" is right to use; thus, smallpox's vaccine is not wrong.

Actual problem in C is use of "gets" in the passive construction.
In passive construction we are allowed to use "to be" form of verb as used in option B.
is derived (correct)
gets derived (wrong)

Refer chapter 7, MGMAT SC guide, Active and Passive voice.
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Re: Most vaccines are derived from weakened or killed strains of [#permalink]

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New post 05 Aug 2017, 07:33
Can anyone pls help me differentiate between option B and C.

Thanks in advance.

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Re: Most vaccines are derived from weakened or killed strains of [#permalink]

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New post 06 Aug 2017, 05:42
kumarparitosh123 wrote:
Can anyone pls help me differentiate between option B and C.

Thanks in advance.

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Most vaccines are derived from weakened or killed strains of the same virus that they prevent, unlike the derivation of smallpox vaccine from a different virus altogether.


(B) smallpox vaccine, which is derived from a different virus altogether

(C) smallpox's vaccine, which gets derived from a different virus altogether

Hi,
here 'most vaccines' are compared with 'smallpox vaccines' .

1.smallpox's vaccines is same as 'vaccines of smallpox' , which is in passive voice therefore not parallel to 'most vaccines'.
2. Here the modifier contains a fact and should be written in simple form. In option C , the modifier is in passive voice ( which is not better than Active in this ques). As per Manhattan Sc 'Do not use other verbs besides 'be', such as get, to form the passive voice'.
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Re: Most vaccines are derived from weakened or killed strains of   [#permalink] 06 Aug 2017, 05:42
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