There are top 10 populous countries in the world and Pakistan is on_________ number?

A. 3rd
B. 4th
C. 5th
D. 6th

The current population of Pakistan is 221,025,870 as of 2020, based on Worldometer elaboration of the latest United Nations data.
Pakistan 2020 population is estimated at 220,892,340 people at mid year according to UN data.
Pakistan population is equivalent to 2.83% of the total world population.
Pakistan ranks number 5 in the list of countries (and dependencies) by population.
The population density in Pakistan is 287 per Km2 (742 people per mi2).
The total land area is 770,880 Km2 (297,638 sq. miles)
35.1 % of the population is urban (77,437,729 people in 2020)
The median age in Pakistan is 22.8 years.