Question

Which personal pronoun correctly completes the sentence?

The friendliest coach is __________.

A.
him

B.
he

C.
his

Answer 1

The answer is A. him, since this is what we call the object of the sentence.

"He" is a subject and would not fit
"His" is possessive and I don't think the sentence is saying someone owns the friendliest coach!

Answer 2

The friendliest friend is him. 

This shows the personal pronoun.