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If a + 2b - c = 0 and a xx b + b xx c + ...

If `a + 2b - c = 0` and `a xx b + b xx c + c xx a = lambda (a xx b)`, then the value of `lambda` is equal to a)5 b)4 c)2 d)-2

A

5

B

4

C

2

D

`-2`

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The correct Answer is:
D
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