The question is divided into four parts where one of the parts may or may not contain an error. Choose the part that has the error as your answer. If all the parts are correct choose “No error” as the answer choice.

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

Correct option is B

Correct Answer: B

Explanation:

Part (A): “Sarah is considered one of”
Correct. The structure “one of + plural noun” is standard.

Part (B): “the top researcher in the field”
This part contains the error.

Grammar Rule:
After “one of the”, the noun must be in plural form because it refers to one member of a group.

• Incorrect: one of the top researcher
• Correct: one of the top researchers

Part (C): “of neuroscience due to”
Correct usage; no grammatical issue.

Part (D): “her groundbreaking discoveries”
Correct and meaningful.

Correct Sentence:
Sarah is considered one of the top researchers in the field of neuroscience due to her groundbreaking discoveries.