The quantitative and statistical study of human population is

The correct option is D Demography

• Calligraphy is an art of beautiful decorative writing using a pen or brush.
• Demography is the quantitative and statistical study of the human population such as birth, death, migration, aging, income, etc.
• The topography is the art or science of studying the detailed features or parts on the surface of or within an organism.
• Seismography is the scientific method of detecting and recording vibrations and intensity of earthquakes

So, the correct answer is 'Demography'