**Core Concept**
The Indian Council for Medical Research (ICMR) and the Ministry of Health and Family Welfare, Government of India, have formulated guidelines for supplementation of pregnant and lactating women under the Integrated Child Development Services (ICDS) program. These supplements aim to bridge the nutritional gap and ensure the optimal health of both the mother and the child.

**Why the Correct Answer is Right**
The ICDS supplements include essential nutrients such as iron, folic acid, calcium, and vitamin B12. These supplements are given to prevent and treat anemia, ensure proper fetal development, and support the overall health of the pregnant woman. The supplements are designed to be taken in addition to a balanced diet, and their intake is crucial for a healthy pregnancy outcome.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as it does not specify the correct supplements given under ICDS.
**Option B:** This option is incorrect as it may contain supplements not recommended under ICDS or may be incomplete.
**Option C:** This option is incorrect as it may contain supplements not recommended under ICDS or may be incomplete.

**Clinical Pearl / High-Yield Fact**
It is essential for pregnant women to consume the recommended ICDS supplements regularly to prevent anemia and ensure proper fetal development.

**Correct Answer:** D. Iron, folic acid, calcium, and vitamin B12