What is the number of electrons present in the $3d$ orbital of $Ti$ in the $+2$ oxidation state?

Given,
$(A)$ $n=5, m_l=-1$
$(B)$ $n=3, l=2, m_l=-1, m_s=+\frac{1}{2}$
The maximum number of electron$(s)$ in an atom that can have the quantum numbers as given in $(A)$ and $(B)$ respectively are:

Electronic configuration of deuterium atom is

The orbital angular momentum for a $d$-electron is

What are the electronic configurations of elements with atomic numbers $Z = 117$ and $Z = 120$?

Given below are two statements :
Statement $I$ : $A$ spectral line will be observed for a $2p_x \rightarrow 2p_y$ transition.
Statement $II$ : $2p_x$ and $2p_y$ are degenerate orbitals.
In the light of the above statements,choose the correct answer from the options given below :