Correct option is B
Introduction
Different types of population density were developed to provide a more meaningful understanding of population–resource relationships, beyond simple arithmetic density.
- Physiological Density → Allan (III)
- Comparative Density → Trewartha (II)
- Economic Density → Simon (IV)
- Critical Density → Vincent (I)
Therefore:
P-III, Q-II, R-IV, S-I → (b)
- Physiological density relates population to cultivable/arable land.
- Comparative density compares population pressure across different areas.
- Economic density relates population to the economic resources/capacity of an area.
- Critical density indicates the population level beyond which available resources may become inadequate.
Correct Answer: (b)