Q. In n is odd and $C_{r} =^{n} C_{r}$ then the value of $C_{0}^{2} - C_{1}^{2} + C_{2}^{2} - C_{3}^{2} + ..... + (- 1)^{n} C_{n}^{2}$ is

1357 173 Binomial Theorem Report Error

A

0

20%

B

$2^{2 n - 2}$

60%

C

$^{2 n} C_{n}$

20%

D

$2^{2 n}$

0%

Solution:

Correct answer is (a) 0