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A straight line passing through (1, 1, 1...

A straight line passing through (1, 1, 1) makes an angle of `60^(@)` with the positive direction of the z-axis, and the cosines of the angles made with the positive directions of y, x-axis are in the ratio `sqrt(3):1`. Then the acute angle between the two possible positions of the line is

A

`pi//2`

B

`pi//6`

C

`pi//3`

D

`pi//3`

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