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).
Though he stoutly persisted in denying his involvement in the case, the facts made it very clear that he had hand in the cruel murder of his wife.
Though he stoutly persisted in denying his involvement in the case,
the facts made it very clear
that he had hand in the cruel murder of his wife.
No error.
Correct answer is C
that he had involved in the cruel murder of his wife.