The atom which contains an electron with quantum number n=3,l=2,m=−1,s=−12 is:

The electronic configuration of given atoms is:  11Na=1s22s22p63s1. For n=3,l=2,m=−1 and s=−12, sub-shell is 3d. Since 3d is present in vanadium, V, the correct answer is (c).