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avikroy
GMATNinja @Abhimahna..........Guys need your help in this question.......i still feel option A is better than OA
Let's focus on the word by. When we say the argument by X, we mean that X is the one presenting his or her line of thinking. For example:

The argument by the Prime Minister that a government bailout was the only way to save the bank was rejected by his own party members.

This means that the PM advocated a government bailout for the bank. Similarly, if we talk about an argument by math historians, we introduce something that all math historians (as a group) agree on. However, the meaning of the sentence is that math historians are arguing among themselves.
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avikroy
GMATNinja @Abhimahna..........Guys need your help in this question.......i still feel option A is better than OA
Let's focus on the word by. When we say the argument by X, we mean that X is the one presenting his or her line of thinking. For example:

The argument by the Prime Minister that a government bailout was the only way to save the bank was rejected by his own party members.

This means that the PM advocated a government bailout for the bank. Similarly, if we talk about an argument by math historians, we introduce something that all math historians (as a group) agree on. However, the meaning of the sentence is that math historians are arguing among themselves.


Thank you @AjiteshArun..................meaning wise A doesnt score points....
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"this" is used as a pronoun. Isn't it wrong?
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"this" is used as a pronoun. Isn't it wrong?
Not quite. "This" precedes "argument" -- and "argument" is the noun, so "this" basically functions as an article (technically a determiner if you like grammar jargon). So there's no problem.

I hope that helps a bit!
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In B
subject 'math historians' is plural which gets the plural verb 'argue' .
So when we use 'This' after semicolon shouldn't it refer to multiple arguments made by math historians over the same topic 'who invented calculus '?
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In B
subject 'math historians' is plural which gets the plural verb 'argue' .
So when we use 'This' after semicolon shouldn't it refer to multiple arguments made by math historians over the same topic 'who invented calculus '?

Hi

You are perfect in that the plural subject "math historians" necessitates the usage of the plural verb "argue". This means that the action of arguing performed by the math historians must be expressed in plural form, since there are more than one historians performing the said action. It does not mean that the noun reference of the verb should also be in plural form. It could well be that several historians are having the same argument repeatedly. In this case, the argument itself is a singular noun.

This is the form adopted by the second half of the sentence. There is nothing wrong with this usage.

Hope this helps.
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Altough , in the above threads reason for why Option A is wrong is explained .
But isn't their any simple reasoning associated for eliminating A.
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Hello from the GMAT Club VerbalBot!

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