Q.

Match the column consider the following four pairs of lines in column –I and match them with one or more entries in column -II

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a

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,
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,
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,
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b

Non coplanar lines

,

Line lie in a unique plane

,

Infinite planes containing both the lines

,

Lines do not intersect

answer is , , , A.

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Detailed Solution

(A) Two lines have same DRs and (2,1,-3) lie on L1 so two lines are coincident
(B) Two lines are non parallel but coplanar so they are contained in same plane
(C) Two line are parallel but not coincident
(D) Two lines are sknew i.e non coplanar nor parallel

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