Comprehension Passage
Direction: Study the following information to answer the given questions:
Six persons P, Q, R, S, T and U are sitting in a row. All are facing north. Each of them has different number of books from 1 to 6. T sits second to the left of S, who has 3 books. At least two persons sit to the left of T. R has twice books than that of P. R sits immediate left of Q, who is not the 3rd person from any end. U is not adjacent to T. Person, who has 2 books, is second to the right of one, who has 1 book. T does not have odd number of books.
P has ____ books.
1
4
2
6
3
2
4
3
5
1