Q 1685780667.     The lines `(x -1)/1 = (y-3)/1 = (z-4)/(-k)` and `(x-1)/k = (y-4)/2 = (z-5)/1` are coplaner, if

BITSAT 2016
A

`k = 3` or `- 3`

B

`k = 0` or `- 1`

C

`k = 1` or `-1`

D

`k = 0` or `-3`

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