**Core Concept**
The Anganwadi worker is a crucial component of the Indian government's public health and nutrition program aimed at improving the health, nutrition, and education of children, pregnant women, and nursing mothers.

**Why the Correct Answer is Right**
The Integrated Child Development Services (ICDS) program, launched in 1975, focuses on providing supplementary nutrition, health education, and preschool education to children under six years of age. Anganwadi workers are responsible for implementing the program's objectives at the grassroots level. They conduct regular health check-ups, provide immunization services, and promote healthy practices among the target population.

**Why Each Wrong Option is Incorrect**
**Option A:** The National Health Mission (NHM) is a broader program that aims to improve healthcare services in rural areas, but it is not specifically focused on child development and nutrition.
**Option B:** The National Rural Health Mission (NRHM) is a sub-component of the NHM, focusing on improving rural healthcare infrastructure, but it is not directly related to the Anganwadi worker's role.
**Option C:** The Mid-Day Meal Scheme is a program that provides free meals to school-going children, but it is not the primary program associated with Anganwadi workers.

**Clinical Pearl / High-Yield Fact**
The ICDS program is a prime example of a community-based intervention that has contributed significantly to reducing child mortality rates and improving overall health outcomes in India.

**Correct Answer: C. ICDS. Integrated Child Development Services.**