If x^2 + y^2 + z^2 =2 (x-y-z) - 3, then ...

If `x^2 + y^2 + z^2 =2` (x-y-z) - 3, then the value of 2x - 3y + 4z is [Assume that x, y, z are all real numbers] :

A

9

B

1

C

3

D

0

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The correct Answer is:

B

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