Who of the following said, "what gravity is to physical world, social capillarity is to the social order"?

According to the theory of demographic transition, the developing countries of the third world lie in the . . . . . . . .

A. Stage one

B. Stage two

C. Between stage one to two

D. Area of the more from stage two to three

Population pyramid is a graphic representation of . . . . . . . .

A. Fertility ratio of the population

B. Age-sex distribution of the population at a given time

C. Mortality ratio of the population

D. Fertility and mortality ratio of the population

Who wrote 'An Essay on the principle of population'?

A. Malthus

B. Marx

C. Thompson

D. Doubleday

Which one of the following is not covered under the category of conscious controls?

A. Use of contraceptives

B. Legal permission for abortion

C. Infanticide

D. Taboos against fornication