In: Chemistry
3d:
for n=3,
s, p and d orbitals are possible
So, 3d is possible
1p:
for n=1,
Only s orbital is possible
So, 1p is not possible
2f:
for n=2,
s and p orbitals are possible
So, 2f is not possible
5f:
for n=5,
s, p, d, f and g orbitals are possible
So, 5f is possible
2d:
for n=2,
s and p orbitals are possible
So, 2d is not not possible
Possible: 3d, 5f
Not possible: 1p, 2f, 2d