Let P = {(x, y) | x2 + y2 = 1, xy ∈ R}. Then P is
A. Reflexive
B. Symmetric
C. Transitive
D. Anti-symmetric
Answer:B
Let P = {(x, y) | x2 + y2 = 1, xy ∈ R}. Then P is
A. Reflexive B. Symmetric C. Transitive D. Anti-symmetric