Answer:
B
Step-by-step explanation:
The electrons are placed in 4 sublevels: s, p, d, and f. The sublevels contain orbitals and each orbital can carry maximum 2 electrons.
s is the lowest sublevel having only one orbital and can hold a maximum of 2 electrons; p has 3 orbitals and can carry a maximum of 6 electrons, d has 5 orbitals and can carry a maximum of 10 electrons; and f is the highest orbital having 7 orbitals and can hold maximum 14 electrons.
Hence, B is not one of the four sublevels that electrons can be placed in.