The three features of a community are:

Correct option is A

Ans. (a)
Sol. A community is defined by its location (geographical area), population (people living in that area), and social system (interactions and institutions among them).
Explanation of each option:
· (a) Location, population and social system – Correct. These are the defining features of a community in public health.
· (b) Primary, secondary and tertiary – These are levels of prevention, not features of a community.
· (c) Agent – Host – Environment – Refers to the epidemiological triad of disease causation, not community features.
· (d) Physical – Mental – Social – These are dimensions of health, not community characteristics.