Q 1247112983.     A line `OP` through origin `O` is inclined at `30^o` and `45^o` to `OX` and `OY` respectively. The angle at which it is inclined to `OZ` is:

A

Such line does not exist.

B

`60°`

C

`45°`

D

`90°`

HINT

Let `l, m, n` be the direction cosines of the given vector, then `l^2 + m^2 + n^2 = 1`

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