n(c(2)) : n(c(4)) = 2:1 तो n का मान है|...

`n_(c_(2)) : n_(c_(4)) = 2:1` तो n का मान है|

A

8

B

7

C

6

D

5

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n(c(2)) : n(c(4)) = 2:1 तो n का मान है|
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