Study of population is

Palentology
Geofraphy
Demography
None of these

The correct answer is C. Demography.

Demography is the statistical study of human populations and sub-populations. It can be a very broad topic, covering topics such as population size, growth, age structure, sex ratio, health, fertility, mortality, migration, and urbanization.

Paleontology is the study of fossils, the remains of ancient life. It can be used to study the evolution of life on Earth, as well as the history of the Earth itself.

Geography is the study of the Earth and its features, including its physical features, climate, and human activity.

None of these options are correct.