How many maximum number of electrons are present in an element (Z = 35) which have quantum number values?

$l\le 2$,          $\left|m\right|<2,$                     $s=+\frac{1}{2}$

The maximum number of electrons are present in an element (Z = 35) which have quantum number values is 18.

Here,

$l\le 2$

$\left|m\right|<2,$

$s=+\frac{1}{2}$

when 

$\begin{array}{r}l=0,1,2\\ m=-1,0,+1\\ s=+\frac{1}{2}\\ n=1,2,3,4\end{array}$

Possible $1s,2s,2p,3s,3p,4s,4p,3d$

Hence, the option C is correct.