Which quantum number provides information about the shape of an orbital?

The azimuthal quantum number is given the shape of the orbital. It is a quantum number for an atomic orbital that determines its orbital angular momentum and describes its shape. The azimuthal quantum number is the second of a set of quantum numbers representing an electron's unique quantum state. For example $\mathrm{l} = 0$ represent spherical orbital, $\mathrm{l}=1$ represent dumbbell shape orbital
Hence, option B is the correct answer.