Read the sentence below to find out whether there is any grammatical error in it. The error, if any, will be in one part of the sentence. Choose the option with that part as your answer. If there is no error, choose 'D' as your answer. (Ignore the errors of punctuation, if any).
Do you know to play the guitar?
Do you know
to play
the guitar?
No error.
Correct answer is B
how to play