**Core Concept:**
The question pertains to the dosage of iron supplementation, specifically iron with folic acid, administered to pregnant women by healthcare workers. Iron is essential for red blood cell production and is crucial for the normal development of the fetus during pregnancy. Folic acid is a B vitamin essential for preventing neural tube defects. In many countries, pregnant women are advised to take iron and folic acid supplements to ensure their health and the health of the developing fetus.

**Why the Correct Answer is Right:**
The correct answer is D, which states that the health worker gives 60 mg of folic acid along with 60 mg of elemental iron to the pregnant woman. This dosage is a standard recommendation for iron supplementation in pregnancy, as outlined by the World Health Organization (WHO) and other medical organizations. The combination of folic acid and iron is particularly important as it addresses two crucial nutritional requirements for pregnant women and their developing fetuses.

Folic acid addresses the need for folate, which is essential for DNA synthesis, cell division, and preventing neural tube defects. Iron, on the other hand, addresses the need for hemoglobin production and oxygen transport to the fetus, thereby ensuring proper fetal growth and development.

**Why Each Wrong Option is Incorrect:**
A. This option suggests giving 60 mg of folic acid, which is correct but lacks the necessary elemental iron dosage. Adequate iron intake is essential for proper fetal development, and this option does not address that aspect.
B. This option provides the correct dosage of elemental iron but lacks the recommended dosage of folic acid. As mentioned earlier, folic acid is equally important for fetal development, making this option incorrect.
C. This option combines both folic acid and iron but with an incorrect total dosage. The provided dosages are not consistent with the recommended dosages from WHO and other medical organizations.

**Clinical Pearl:**
The combination of folic acid and iron is crucial for the health of pregnant women and their developing fetuses. The correct dosage is 60 mg of folic acid and 60 mg of elemental iron per day, as recommended by the WHO and other medical organizations. Ignoring either of these nutrients or providing an incorrect dosage can have detrimental consequences for both the mother and the fetus. Ensuring proper nutritional support during pregnancy is vital to reduce the risk of complications like low birth weight, premature birth, and neural tube defects.