Let R be a relation from a set A to a set B. The inverse relation from B to A, denoted by
, is the set of ordered pairs
.
S1: R is reflexive relation iff 
S2: R is a symmetric relation iff 
Which one of the following statements is true?
(A).Only S1
(B).Only S2
(C).Both S1 and S2
(D).None