Read each sentence to find out whether there is any grammatical error in it. The error, if any will be in one part of the sentence. The letter of that part is the answer. If there is no error, the answer is 'E'. (Ignore the errors of punctuation, if any).
Had I come to know about his difficulties would have certainly helped.
Had I come
to know about
his difficulties
would have certainly helped.
No error
Correct answer is D
would certainly have helped him