The Mission Indradhanush, an initiative of Govt. of India, is associated with:

immunisation

The correct answer is Option (1) - immunisation

The Mission Indradhanush is a flagship initiative of the Government of India aimed at accelerating immunization coverage across the country. Launched in 2014, it focuses on achieving full immunization coverage for all children and pregnant women by reaching those who are left unvaccinated or partially vaccinated. The program operates through a series of intensified immunization drives targeting high-risk areas and underserved populations. By providing vaccines against preventable diseases such as polio, measles, tuberculosis, and hepatitis, Mission Indradhanush aims to reduce child mortality and morbidity and contribute to public health outcomes in India.