I'm working with linking, transitive and intransitive verbs. For this sentence, do I need to write it as a statement? I think it is a linking verb. Intransitive?

Question

"What is the most popular song in the country this week?"

Answer 1

"What is the most popular song in the country this week?"

That is a question.

The verb, "is," is a linking verb.

Answer 2

Is it also intransitive?

Answer 3

All linking verbs are intransitive -- they cannot have direct objects following them.

Answer 4

Can What be a subject? Or is song the subject?

Answer 5

In this sentence, "What" is the subject and "song" is the predicate noun (also called predicate nominative).

http://grammar.ccc.commnet.edu/grammar/index2.htm