The number of distinct real values of al...

The number of distinct real values of `alpha`, for which the vectors `-lamda^(2) hati +hatj+hatk, hati -lamda^(2)hatj +hatk and hati +hatj -lamda^(2)hatk` are coplanar is

A

0

B

1

C

2

D

3

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The correct Answer is:

C

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