Q 1387223187.     If a line `bar {AB}` makes angle `45^{circ}` with positive `x`-axis and `120^{circ}` with positive `y`-axis, then the angle `theta` made by the line with positive `z`-axis is ?

A

`30^{circ}`

B

`45^{circ}`

C

`60^{circ}`

D

`75^{circ}`

HINT

given that `bar {AB}` makes `45^{circ},120^{circ}` and `theta` with the coordinate axes,

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