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.
I really do regret not to learn to play the violin when I had so many opportunties to learn and practise in school.

Options

A. No error
B. I really do regret not to learn to play the violin
C. when I had so many opportunities
D. to learn and practise in school.

Answer

B

Explanation

Here, I really regret not to leam how to play the violin is the right usage.