If $n = 3$,which of the following values of $l$ is correct?

Given below are the quantum numbers for $4$ electrons.
$A. \; n = 3, l = 2, m_l = 1, m_s = +1/2$
$B. \; n = 4, l = 1, m_l = 0, m_s = +1/2$
$C. \; n = 4, l = 2, m_l = -2, m_s = -1/2$
$D. \; n = 3, l = 1, m_l = -1, m_s = +1/2$
The correct order of increasing energy is

Which of the following orbitals are possible: $1p, 2s, 2p, 3f$?

The electronic configuration $1s^2 2s^2 2p_x^1 2p_y^1 2p_z^1$ corresponds to which of the following elements?

The energy required to remove an electron from different subshells of a $H$ atom is given below. What is the order of these energies?

The maximum number of electrons in a $p$-orbital with $n=5, m=1$ is$-$