If [{:( 2 + x , 3 , 4 ) , (1 , -1 , 2 ) ...

If `[{:( 2 + x , 3 , 4 ) , (1 , -1 , 2 ) , (x , 1 , -5):}]` is a singular matrix then x is

A

`- (12)/(5)`

B

`-7`

C

`- (8)/(13)`

D

`-(25)/(13)`

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The correct Answer is:

D

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