If A={a,b,c,d}, then on A .
(i) write the identity relation `I_(A)` .
(ii) write a reflexive relation which is not the identity relation.

Answer

(i) {(a,a),(b,b),(c,c),(d,d)} `" "` {(a,a),(b,b),(c,c),(d,d),(a,c),(b,d)}