Let R be the equivalence relation on N 1 = n N : n 2 defined by for m, n N 1 , m R n if m n is a rational number. Then

Options

1. Am and n have the same number of distinct prime divisors whenever m R n
2. Bthe number of equivalence classes is finite
3. Call prime numbers are in the same equivalence class
4. Dthere exists an equivalence class with finitely many elements