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If veca is a non zero vector of magnitud...

If `veca` is a non zero vector of magnitude 'a' and `lambda` a nonzero scalar, then `lambda vec a` is unit vector if

A

`lambda = 1`

B

`lambda = -1`

C

`a = |lambda|`

D

`a = (1)/(|lambda|)`

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The correct Answer is:
(d)
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