If a relation on (A={1,2,3,4}) is reflexive and has total (6) pairs, at least how many of them must be self-pairs?

Correct answer: (4)

Step 1: A reflexive relation needs one self-pair for each element. Step 2: (A) has four elements, so four self-pairs are compulsory. Step 3: Total pairs may be more, but compulsory self-pairs equal the number of elements.