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).
I have an appointment on the 9th September on five o'clock
I have
an appointment
on the 9th September on five o'clock
No error.
Correct answer is C
on the 9th September at five o'clock