Which of the following correctly expresses the Rate of Natural Increase (RNI) of a population?

• A Crude birth rate multiplied by crude death rate, expressed per 1000 population
• B Crude birth rate minus crude death rate, expressed per 1000 population ✓
• C Net migration added to crude birth rate, expressed per 1000 population
• D Growth rate of the population including international migration

Explanation

The rate of natural increase is simply the crude birth rate minus the crude death rate, expressed as a percentage or per 1000 population, and reflects growth due only to births and deaths. Migration is deliberately excluded; once net migration is added, the measure becomes the overall population growth rate. Multiplying the two rates has no demographic meaning.

Reference: Park's Textbook of Preventive and Social Medicine, 25th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

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