39! is divided by 41. Then what is the remainder?	Choose the most appropriate option.
A) 1
B) 3
C) 4
D) 6
E) 9

Rationale: "substituting p = 41 in the wilson ' s theorem , we get 40 ! + 141 = 0 40 × 39 ! + 141 = 0 − 1 × 39 ! 41 = − 1 cancelling - 1 on both sides , 39 ! 41 = 1 a"
Answer: A