Each question is divided into four parts where one of the parts may or may not contain an error. Choose the partthat has the error as your answer. If allthe parts are correct choose

“No Error”.

Sarah is considered one of (A)/ the top researcher in the field (B)/ of neuroscience due to (C)/ her groundbreaking discoveries. (D)

To identify the error in the sentence, let's analyze each part grammatically:

1. "Sarah is considered one of" (Part A): This part is grammatically correct. The subject "Sarah" is singular and correctly takes the singular verb "is". The phrase "is considered" is a passive construction, which is appropriate here.
2. "the top researcher in the field" (Part B): This part contains a grammatical error. The construction "one of the" must always be followed by a plural noun because it refers to a single member selected from a group of multiple members. Therefore, the singular noun "researcher" should be replaced with the plural noun "researchers". The corrected phrase should be "one of the top researchers".
3. "of neuroscience due to" (Part C): This part is grammatically correct. It correctly identifies the field of study ("neuroscience") and uses the prepositional phrase "due to" to introduce the reason for Sarah's status.
4. "her groundbreaking discoveries." (Part D): This part is grammatically correct. The possessive pronoun "her" correctly refers back to "Sarah", and "groundbreaking discoveries" is a correct noun phrase acting as the object of the preposition "to".

Therefore, the error is in Part B.