Which is a correct set of values of m for one of the subshells of n = 2?

-1, 0, 1

-1, - 2, 0, 1, 2

-1, - 2, - 3, 0, 1, 2, 3

-1, - 2, - 3, - 4, 0, 1, 2, 3, 4

The answer is - 1, 0, 1.

For a given value of principal quantum number (n), the corresponding angular quantum number (l) value is equivalent to (n - 1). From this, you can get the set of values for mangetic quantum number m is:

m = - l, ..., 0, ..., l

So for n=2, l = 1, and m = - 1, 0, 1