A boy is waiting for you for a long time, In this sentence the word "boy" is?

proper noun

common noun

abstract noun

collective noun

The noun 'boy' is not a proper noun.

It is a common noun because it does not give the name of a specific boy.

A Few examples of proper nouns are India, January, Christmas, Monday, Alex, Meera, etc.

A Few examples of common nouns are table, chair, book, boy, girl, bedroom, school, college, etc.