If there were $8$ periods in the periodic table and each orbital could have a maximum of $5$ electrons, then what is the maximum number of elements that would be present in period $8$?

The correct option is B $125$
The possible subshells present in $8^{th}$ period:
8s 8p 7d 6f 5g

As per the question, s,p, d, f, g orbitals can have 5, 15, 25, 35, 45 electrons respectively. The total number of elements will be 125.