Which set of quantum numbers for an electron of an atom is not possible

Options

A. n=1, l=0 , m=0 , s=+1/2
B. n=1, l=1 , m=1 , s=+1/2
C. n=1, l=0 , m=0 , s=-1/2
D. n=2, l=1 , m=-1 , s=+1/2

Answer

B

Explanation

n=1 and l=1 not possible for s-orbitals