In the following question, the given sentence has four parts marked P, Q, R, and S. Choose the part of the sentence with the error and mark as your answer. If there is no error, mark 'No error (S)' as your answer.
A prince were (P)/ in search of a Sufi master (Q)/ to help him in his mystical journey. (R)/ No error (S)

Correct option is A

Option (a) contains an error.
Error Identification: The verb "were" is incorrect when referring to the singular subject "A prince." It should be "was."
Grammatical Explanation: The singular subject "A prince" requires the singular verb "was."
Corrected sentence: "A prince was in search of a Sufi master to help him in his mystical journey."
Explanation: The singular subject "prince" should be followed by the singular verb "was."