1.

Let A = {a,b,c,d} and R = {(a,b),(a,c),(a,d), (b,c), (b,d), (c,d)} then R =R is equal to

Answer»

{(a,B),(a,C),(b,d),(c,d)}
{(a,c),(a,d),(b,d)}
{(a, c), (a, d), (b, c)}
{(a, b), {a, c), (c, d), (b, d)}

ANSWER :B


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