Spot the error in the following sentence.
A. One of the members
B. expressed doubt if
C. the Pope was an atheist.
D. No error.

B

The error is in option B. The correct sentence should be:

B. expressed doubt whether

Explanation for each option:

☀ A: There is no error in option A. The sentence is grammatically correct: "One of the members."

☀ B: The error is in option B. The word "if" should be replaced with "whether" in this context. When expressing doubt or uncertainty between two alternatives, "whether" is used instead of "if."

☀ C: There is no error in option C. The sentence is grammatically correct: "the Pope was an atheist."

☀ D: The statement "No error" is incorrect because the error is in option B, as explained above.