## **Core Concept**
The Maternal and Child Health (MCH) program is an initiative aimed at improving the health of mothers and children. Iron and Folic Acid (IFA) supplementation is a critical component of this program, targeting pregnant women, lactating mothers, and children to combat anemia and ensure adequate nutrition.

## **Why the Correct Answer is Right**
The correct answer, **D. 100 mg iron and 500 mcg folic acid**, reflects the standard composition of adult IFA tablets provided under the MCH program. These tablets are specifically designed to meet the increased demands for iron and folic acid during pregnancy and lactation, helping to prevent anemia and support the healthy development of the fetus and the mother.

## **Why Each Wrong Option is Incorrect**
- **Option A:** 20 mg iron and 100 mcg folic acid - This option provides lower doses than those typically recommended for pregnant women under the MCH program.
- **Option B:** 50 mg iron and 200 mcg folic acid - Although closer, this still does not match the standard adult IFA tablet composition provided under the program.
- **Option C:** 500 mg iron and 100 mcg folic acid - This option contains a much higher dose of iron than what is standard for adult IFA tablets under the MCH program.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that the MCH program's IFA tablets for adults contain **100 mg of iron and 500 mcg of folic acid**. This is crucial for preventing and treating iron deficiency anemia in pregnant and lactating women, which is a significant public health concern in many regions.

## **Correct Answer:** D. 100 mg iron and 500 mcg folic acid.