Answer : 3. "Both (A) and (C) are correct."
Explanation :

mportant Points Statement (A) is correct: Population density is the number of people living in a unit area of the earth’s surface. How crowded a country is, has little to do with its level of economic development. For example, both Bangladesh and Japan are very densely populated but Japan is far more economically developed than Bangladesh. Hence, an economically developed country could be a densely populated country. Statement (B) is not correct: The number of women and men in a country is an important demographic characteristic. The ratio between the number of women and men in the population is called the Sex Ratio. The sex ratio is an important information about the status of women in a country. In regions where gender discrimination is rampant, the sex ratio is bound to be unfavourable to women. Such areas are those where the practice of female foeticide, female infanticide and domestic violence against women are prevalent. One of the reasons could be lower socio-economic status of women in these areas. However more women in the population's base does not mean they have a better status. It could be that the men might have migrated to other areas for employment. Statement (C) is correct: Population composition refers to the structure of the population. The composition of population helps us to know how many are males or females, which age group they belong to, how educated they are and what type of occupations they are employed in, what their income levels and health conditions are. An important tool for studying the population composition of a country is by looking at the population pyramid.