Truth, Lie or Both ...

There are three students Anu, Bob and Coy. They have exactly three books - one on Physics, one on Chemistry and one on Math. Each of these three books belongs to exactly one of the students. As I wanted to know the names of the respective owners of the books I asked them about the owners of the books. The following are the answers given by Anu, Bob and Coy.

Anu : Physics book belongs to me. Maths book does not belong to Bob. Chemistry book does not belong to Coy.
Bob : Physics book does not belong to me. Chemistry book belongs to Coy. Maths book does not belong to Anu.
Coy : Physics book does not belong to Anu. Maths book does not belong to me. Chemistry book does not belong to Bob.

I knew that exactly one of them always speaks the truth, exactly one of them always lies and the third one alternates between truth and lie, in any order.

Which of the following statements can then be concluded?

1) Anu always tells the truth.
2) Coy always lies.
3) Bob is the owner of the Chemistry book.

NOTE: Out of the given set of 3 statements, it is not necessary that one and only one statement can be concluded. One or more statements can be concluded.