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A. In a recently conducted study, Harvard Scientists have linked a molecule to PGC-1 alpha FNDC5, a protein that enhances the expression of brain-health, not only as promoting the development of new nerves and synapses in the hippocampus of the adult brain, but also preserving existing brain cells. not only as --- but also preserving – un//

B. In a recently conducted study by Harvard Scientists, a molecule PGC-1 alpha FNDC5, a protein enhancing the expression of brain-health, not only promotes the development of new nerves and synapses in the hippocampus of the adult brain, but also preserves existing brain cells.--- In as survey, the protein promotes --- wrong meaning.

C In a recently conducted study by Harvard Scientists, the researchers have linked a molecule to PGC-1 alpha FNDC5, a protein that enhances the expression of brain-health, saying that it not only promotes the development of new nerves and synapses in the hippocampus of the adult brain, but also preserves existing brain cells. ---- Correct choice

D Linking a molecule PGC-1 alpha to FNDC5, a protein that enhances the expression of brain-health, Harvard Scientists claim that the factor not only promotes the development of new nerves and synapses in the hippocampus of the adult brain, but also preserves existing brain cells in a recently conducted study. 1. Wrong word order. In a recently conducted survey modifies brain cells. 2. The introductory modifier modifies ‘a protein’ changing the meaning.

E In a recently conducted study by Harvard Scientists, which linked a molecule PGC-1 alpha to FNDC5, a protein enhancing the expression of brain-health, it not only promotes the development of new nerves and synapses in the hippocampus of the adult brain, but also preserves existing brain cells -- 1.Which modifies the Scientists, 2. It is redundant 3. study linked the molecule; altered intent.

Hello Sir. One doubt on the OA.

In C, doesn't the intended meaning change. As per this choice, it is the researchers and not the Harvard scientists themselves, who are doing the action of linking. As per the question stem- the action was performed by the Harvard scientists.

Could you please help me understand this?
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I am quite surprised that "saying" and "it" in C are acceptable. I take notice that "saying" often is present in a right answer, especially if the word follows a commas to modify the preceding clause.
B looks more attractive, but B is a trap.
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chesstitans
I am quite surprised that "saying" and "it" in C are acceptable. I take notice that "saying" often is present in a right answer, especially if the word follows a commas to modify the preceding clause.
B looks more attractive, but B is a trap.

I too was surprised to see saying in the correct answer as it does not make much sense, i was confused between A & C, and identified the flaw in A, but still the use of saying in C makes the sentence a bit awkward.
Can someone explain why "saying" is acceptable here.
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usage of "saying" doesn't seem quite right here. Can you please explain the sentence structure here?
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In a recently conducted study, Harvard Scientists have linked a molecule to PGC-1 alpha FNDC5, a protein that enhances the expression of brain-health, not only as promoting the development of new nerves and synapses in the hippocampus of the adult brain, but also preserving existing brain cells.


A. In a recently conducted study, Harvard Scientists have linked a molecule to PGC-1 alpha FNDC5, a protein that enhances the expression of brain-health, not only as promoting the development of new nerves and synapses in the hippocampus of the adult brain, but also preserving existing brain cells. Parallelism error- not only as X but also Y

B. In a recently conducted study by Harvard Scientists, a molecule PGC-1 alpha FNDC5, a protein enhancing the expression of brain-health, not only promotes the development of new nerves and synapses in the hippocampus of the adult brain, but also preserves existing brain cells. No linking of molecule- changed the sentences entire meaning

C. In a recently conducted study by Harvard Scientists, the researchers have linked a molecule to PGC-1 alpha FNDC5, a protein that enhances the expression of brain-health, saying that it not only promotes the development of new nerves and synapses in the hippocampus of the adult brain, but also preserves existing brain cells. Correct- paralellism- ok, antecedent to it -ok, conveys clear meaning of the sentence

D. Linking a molecule PGC-1 alpha to FNDC5, a protein that enhances the expression of brain-health, Harvard Scientists claim that the factor not only promotes the development of new nerves and synapses in the hippocampus of the adult brain, but also preserves existing brain cells in a recently conducted study.
Changed the meaning of the sentence
E. In a recently conducted study by Harvard Scientists, which linked a molecule PGC-1 alpha to FNDC5, a protein enhancing the expression of brain-health, it not only promotes the development of new nerves and synapses in the hippocampus of the adult brain, but also preserves existing brain cells
same

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