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Re: By examining sets of identical twins in recent studies, mental [#permalink]
[quote="Rubina11"]By examining sets of identical twins in recent studies, mental disorders such as schizophrenia and autism have been found to be the results of variations in gene expression and not simply a matter of genetic inheritance.

A. By examining sets of identical twins in recent studies, mental disorders such as schizophrenia and autism have been found to be

b. By examining sets of identical twins in recent studies, mental disorders such as schizophrenia and autism were found as being

c. Mental disorders such as schizophrenia and autism were examined in sets of identical twins in recent studies and has been found to be

d. Recent studies that examined sets of identical twins have shown that mental disorders such as schizophrenia and autism are

e. Recent studies that examined sets of identical twins has shown that mental disorders such as schizophrenia and autism are

source : Gmat prep plus 2019[/quote

Option D is the correct answer. It does not contain any errors related to the subject-verb agreement.
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Re: By examining sets of identical twins in recent studies, mental [#permalink]
Hello from the GMAT Club VerbalBot!

Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).

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Re: By examining sets of identical twins in recent studies, mental [#permalink]
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