Why is universal immunisation linked with child health in the National Population Policy?

Correct answer: It protects children from preventable diseases

Correct answer: D, it protects children from preventable diseases. Immunisation trains the body to develop protection against particular infections before or when exposure occurs. Universal immunisation means that all eligible children should receive the recommended vaccines, so fewer children suffer severe illness, complications, or death from vaccine-preventable diseases. This improves child health and supports the population policy goal of reducing infant and child mortality. A is wrong because vaccination does not end examinations. B is unrelated to farming or agricultural output. C is wrong because immunisation has no purpose of hiding census figures; health records and population statistics are separate matters. D is the only option that explains the direct health connection. Memory cue: vaccines prevent disease; prevention protects children before illness becomes serious.