Multiple choice The correct set of quantum number for 4d - electrons is ? n= 4 , l = 3 , m = 2 , s = +1 / 2 . n= 4 , l = 2 , m = 1 , s = 0 . n= 4 , l = 3 , m = - 2 , s = +1 / 2 . n= 4 , l = 2 , m = 1 , s = +1 / 2 . Reveal answer Fill a bubble to check yourself D Correct answer Explanation this option is correct because , l value 2 is shown by ' d ' orbital . this configuration represent an electron in 4d orbital . hence this option is correct .