The correct answer is - Nigeria.
Nigeria is the most populated country from the countries on the list, in fact, it is the most populated country in all of Africa. Nigeria has an estimated population of 173 million people, Senegal little more than 14 million, Guinea has little more than 10.6 million, and Liberia little less than 3.5 million people.
Nigeria has almost twice bigger population than the second placed Ethiopia in the African continent. The population of this country is predominantly young, the birth rates are relatively high, and the life expectancy is constantly on the rise. It is expected that the trend of increase in the population of Nigeria will continue for the foreseeable future, just as the population of the African continent as a whole.
