In the following questions, some parts of the sentences have errors and some are correct. Find out which part of a sentence has an error. The number of that part is the answer. If a sentence is free from error, your answer is No error.
By May next year I have been working in this college for twenty years.

Options

A. No error
B. By May next year
C. I have been working in this college
D. For twenty years.

Answer

C

Explanation

Here, Future Perfect Continuous i.e. I will have been is the right usage. The sentence shows future time.