**Core Concept**
Mission Indradhanush is a national health mission launched by the Government of India to immunize all children under the age of 2 years, as well as pregnant women, against seven vaccine-preventable diseases: tuberculosis, diphtheria, pertussis, tetanus, polio, hepatitis B, and measles.

**Why the Correct Answer is Right**
Mission Indradhanush aims to achieve full immunization coverage in the country by ensuring that all children under the age of 2 years and pregnant women are vaccinated against these seven diseases. The mission focuses on reaching unvaccinated and under-immunized children in rural and urban areas, with a special emphasis on areas with low immunization coverage. The program is implemented through a network of healthcare providers, including Anganwadi workers, ASHAs, and public health officials.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because Mission Indradhanush is not specifically focused on maternal health, although pregnant women are a target group for vaccination.
**Option B:** This option is incorrect because Mission Indradhanush is not a program aimed at controlling non-communicable diseases (NCDs), but rather vaccine-preventable diseases.
**Option C:** This option is incorrect because Mission Indradhanush is not a program focused on providing free medical treatment to all citizens, but rather a targeted immunization initiative.

**Clinical Pearl / High-Yield Fact**
It's essential for healthcare providers to be aware of the specific target groups and diseases covered under Mission Indradhanush to ensure effective implementation and monitoring of the program.

**Correct Answer:** C.