Latest KVPY Aptitude Question SOLUTION: For a one-electron atom, the set of allowed quantum numbers is – (A) n = 1, l = 0, m1 = 0, ms = +½ (B) n = 1, l = 1, m1 = 0, ms = +½ (C) n = 1, l = 0, m1 = –1, ms = –½ (D)