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).
Immediately after boarding the bus, Mahesh asked the conductor that if he knew where the museum was.
Immediately after boarding the bus,
Mahesh asked the conductor
that if he knew
where the museum was.
No error
Correct answer is C
if he knew