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 (do ) Regret not to learn how to play the violin _____ should be used .