Identify the segment in the sentence. Which contain the grammatical error.
He wondered what was the reason for her refusal to accompany him

Options

A. to accompany him
B. for her refusal
C. He wondered what
D. was the reason

Answer

D

Explanation

“Wh-word + helping verb + subject" is the correct structure of an interrogative sentence(in which a question is asked and which ends with a question mark) for example Who are you?. But, "Wh-word + subject + helping verb" is the correct structure, if an interrogative statement comes within a sentence which ends with a full stop. For example, He asked me where I (subject) was(verb) going. Hence, the reason was. is answer.