Which option is / are correct?

The atomic number 50 element is present in 5th period option is correct.

Tin is a chemical element with the atomic number 50 and the letter Sn (stannum in Latin). It belongs to the group 14 of the periodic table as a post-transition metal. It is primarily derived from the mineral cassiterite, which contains stannic oxide, $Sn{O}_2$.
It belongs to period 5 and group 14 respectively.

Hence, option B is correct.