DIRECTIONS: in the following question, a part of sentence is bold. Below are given alternatives to the bold part which may improve the sentence. Choose the correct alternative. In case no improvement is required, choose “No Improvement” option.
The teacher was very proficient in his subject

Options

A. a) expert
B. b) well-versed
C. c) proficient
D. d) No Improvement

Answer

B

Explanation

well-versed (Adj.): having a lot of knowledge about something , skilled at something Hence, well-versed is the right usage