1.

Mark the correct alternative in the following question:Let L denote the set of all straight lines in a plane. Let a relation R be defined by lRm iff l is perpendicular to m for all l, m ∈ L. Then, R is(a) reflexive (b) symmetric (c) transitive (d) none of these [NCERT EXEMPLAR]

Answer» Mark the correct alternative in the following question:



Let L denote the set of all straight lines in a plane. Let a relation R be defined by lRm iff l is perpendicular to m for all l, m L. Then, R is



(a) reflexive (b) symmetric (c) transitive (d) none of these

[NCERT EXEMPLAR]


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