It is not about "hour" starting with vowel, sir. It is about the sound. "Hour" sounds like "our", so "an". "University" sounds like "yoo", so "a". My English coaching madam drilled this. At night, checking "an invoice" or "a user log", my tired mind repeats the rule like a mantra to stay awake.
#university#aiu
Jump in to reply — no account needed.