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Let L be the set of all straight lines ...

Let `L` be the set of all straight lines in the Euclidean plane. Two line `l_(1)` and `l_(2)` are said to be related by the relation`R` of `l_(1)` is parallel to `l_(2)`, Then `R` is

A

Symmetric only

B

Transitive only

C

Reflexive only

D

Equivalence only

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The correct Answer is:
D
NA
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