How many orbitals are in an f sublevel $(l=3)$?

The orbitals are in an f sublevel $(l=3)$ is 7.

We begin by adding electrons to an atom at the first level since it is lower in energy and closer to the nucleus. The second level is then filled in, and so on. There are 7 orbitals in the f subshell.

Hence, the option C is correct.