यदि a+b+c+d=4 हो तो (1)/((1-a)(1-b)(1-c)...

यदि `a+b+c+d=4` हो तो `(1)/((1-a)(1-b)(1-c))+(1)/((1-b)(1-c)(1-d))+(1)/((1-a)(1-b)(1-c))+(1)/((1-b)(1-c)(1-d))+` का मान बताइए |

A

`0`

B

1

C

4

D

`1 + abcd`

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The correct Answer is:

A

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