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If vec a = i + 2j+3k, vec b = i-2j+k, ve...

If `vec a = i + 2j+3k, vec b = i-2j+k, vec c = 4i+3j-2k` and `vec a + lambda vec b` is perpendicular to `vec c` then `lambda =`

A

1

B

2

C

3

D

4

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