Which are the four quantum numbers for an electron present in 4f orbital?

Correct option is A

The four quantum numbers for an electron present in a 4f orbital are:
- Principal quantum number (n) = 4
- Azimuthal quantum number (l) = 3
- Magnetic quantum number (m) = +1
- Spin quantum number (s) = +1/2
 n (principal): shell or energy level (n = 4 means the electron is in the 4th shell).
 l (azimuthal): subshell and its shape (l = 3 corresponds to the f subshell).
 m (magnetic): orientation of the electron's orbital within a subshell (m = +1 specifies a particular orbital).
 s (spin): the electron's spin (s = +1/2 indicates spin "up").