Which of the following statements has correct subject verb agreement?

Question

The books on the front shelf are in in alphabetical order.
The books on the front shelf are in in alphabetical order.

The books on the front shelf is in alphabetical order.
The books on the front shelf is in alphabetical order.

The books on the front shelf am in alphabetical order.
The books on the front shelf am in alphabetical order.

None of the above.

Answer 1

None of the above.