Q1 - A , cuz if A, then one of the numbers is even (other odd) and is not a prime
Q2 - A, cuz 3 -7
Q3 - B, cuz m = abs(n) and m n m = -n, then m+n = 0, and mn = - n^2
Q4 - D, let x=6, y=2, then 6>4; now let x = -6, y = -2, then -6
sorry, a bit lazy to continue...