CLINICAL MEDICINE

Detailed explanation-1: -"University” is a singular countable noun. Although it begins with a vowel, the first sound of the word is /j/ or “y.” Thus, “a” instead of “an” is used.

Detailed explanation-2: -There are six vowels in the English language: a, e, i, o, u and sometimes y. Y is sometimes a vowel, as in the word story although it also sometimes acts as a consonant, as in the word yes. The vocal sounds represented by vowels are open and without friction.

Detailed explanation-3: -The correct preposition is at! For example, you would say: “I’m studying at Harvard University.” Other correct examples using this preposition include: I’m studying for a PhD at the university.