Which set of quantum numbers could represent an electron in a $5f$ orbital?

Quantum numbers could represent an electron in a $5f$ orbital is $l=3,m_l=0$.

It is impossible for the main quantum number (n) to be zero. Therefore, the valid range for n is 1, 2, 3, 4, and so forth. Any integer between 0 and n – 1 may be used as the angular quantum number ($l$). For instance, if n = 3, $l$ can either be 0 or 1 or 2.

Hence, option D is correct.