Mission Indradhanush launched by the Government of India pertains to immunization.

Specifically, it's a special immunization program that aims to

• Increase full immunization coverage - Mission Indradhanush targets children under two years old and pregnant women to ensure they receive all the recommended vaccines for protection against vaccine-preventable diseases.
• Focus on low-coverage areas
• Improve routine immunization

By focusing on these aspects, Mission Indradhanush aims to improve overall child health and reduce the burden of vaccine-preventable diseases in India.

Hence, option A is the correct answer.