For $p$-orbital,the magnetic quantum number has value

The value of the azimuthal quantum number for electrons present in the $4p$ orbital is:

Which of the following is not possible?

In a multi-electron atom,which of the following orbitals have the same energy in the absence of magnetic and electric fields? $(a) n = 1, l = 0, m = 0, (b) n = 3, l = 0, m = 0, (c) n = 2, l = 1, m = 1, (d) n = 3, l = 2, m = 1, (e) n = 3, l = 2, m = 0$

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

Number of unpaired electrons in the ground state of beryllium atom is