Let \( L \) be the set of all straight lines in the Euclidean plane. Two lines \( l_{1} \) and \...

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Let \( L \) be the set of all straight lines in the Euclidean plane. Two lines \( l_{1} \) and \( l_{2} \) are said to be related by the relation \( R \) iff \( l_{1} \) is parallel to \( l_{2} \). Then, the relation \( R \) is not
(A) reflexive
(B) symmetric
(C) transitive
(D) none of these
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