## Core Concept
The Reproductive and Child Health (RCH) programme is an initiative aimed at improving the health of mothers and children. It focuses on providing accessible and affordable healthcare services. The program includes various interventions targeted at specific regions.

## Why the Correct Answer is Right
The correct answer, , refers to the Integrated Management of Neonatal and Childhood Illnesses (IMNCI). IMNCI is a strategy that aims to reduce morbidity and mortality in children. It involves training healthcare workers to assess, classify, and manage illnesses in children. This intervention is indeed implemented in selected districts under the RCH program.

## Why Each Wrong Option is Incorrect
* **Option A:** - This option is incorrect because, although it might relate to some aspect of healthcare or RCH, it does not specifically denote an intervention like IMNCI that is done in selected districts.
* **Option B:** - This option is incorrect as it does not accurately represent a well-known intervention under RCH that is specifically implemented in selected districts.
* **Option D:** - This option is incorrect because it does not correspond to a recognized intervention under the RCH program that matches the description of being implemented in selected districts.

## Clinical Pearl / High-Yield Fact
A key point to remember is that IMNCI is a critical strategy under the RCH program. It focuses on the major causes of mortality among children and provides guidelines for the assessment, classification, and treatment of illnesses. This strategy is particularly important in resource-limited settings.

## Correct Answer Line
**Correct Answer: C. .**