Let a relation R in the set R of real numbers be defined as (a, b) Î R if and only if 1 + ab > 0 for all a, bÎR. The relation R is

Let a relation R in the set R of real numbers be defined as (a, b) Î

1.	Let a relation R in the set R of real numbers be defined as (a, b) Î R if and only if 1 + ab > 0 for all a, bÎR. The relation R is
A.	reflexive and symmetric
B.	symmetric and transitive
C.	only transitive
D.	an equivalence relation
Answer» B. symmetric and transitive