DM-Sets,Relations and Functions-Q12

Question

Let denote a relation on the set of all ordered pairs of positive integers by if and only if . Which of the following is true?

(A). is a partial order relation

(B).  is an equivalence relation

(C). is neither partial order relation nor equivalence relation

(D). is an antisymmetric relation

Answer 1

So correct Answer is B

Answer 2

B is correct one.

Comments

can anyone provide an expalnation, i couldnt visualise because of the ordered pair.