Directions: Read each sentence to find out whether there is any grammatical error in it. The error, if any will be in one part of the sentence. The letter of that part is the answer.
Doctors say that eating red meat is one of a lead cause of heart disease.

Options

A. a) is one of a lead cause
B. b) of heart disease
C. c) Doctors say that
D. d) eating red meat

Answer

A

Explanation

According to the "Subject-Verb Agreement rule", "One of/ Each of/ Most of + Plural Subject + Singular Verb" is grammatically the correct structure. In the given question, the verb should be written in the singular form( causes). Hence, one of the leading causes. will be answer.