The lines (x-2)/(1)=(y-3)/(1)=(z-4)/(-k)...

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

A

`k=0 and k=-1`

B

`k=1 or -1`

C

`k=0 or -3`

D

`k=3 or -3`

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The correct Answer is:

(c)

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