Que: Consider the binary relation, A = {(a,b) | b = a – 1 and a, b belong to {1, 2, 3}}. The reflexive transitive closure of A is?

a. {(a,b) | a >= b and a, b belong to {1, 2, 3}}

b. {(a,b) | a > b and a, b belong to {1, 2, 3}}

c. {(a,b) | a <= b and a, b belong to {1, 2, 3}}