JEE Math Practice Question
The lines $${{x - 2} \over 1} = {{y - 3} \over 1} = {{z - 4} \over { - k}}$$ and $${{x - 1} \over k} = {{y - 4} \over 2} = {{z - 5} \over 1}$$ are coplanar if :
- A.$$k=3$$ or $$-2$$
- B.$$k=0$$ or $$-1$$
- C.$$k=1$$ or $$-1$$
- D.$$k=0$$ or $$-3$$
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