Anthropometric indicators of undernutrition in children aged 1-5 years:
MUAC < 12.5 cm: Indicates moderate to severe acute malnutrition (wasting) (A).
Chest circumference < Head circumference: In normal children, chest circumference exceeds head circumference after the age of 1 year. If chest circumference remains smaller than head circumference after 1 year, it indicates protein-energy malnutrition (PEM) and poor chest/muscle development (D).
Low weight for height: Defines acute malnutrition or wasting (E).

• is inverted ('low height for weight' is not an index; standard indices are height-for-age [stunting] and weight-for-height [wasting]).
• MUAC 13.5 cm indicates normal nutritional status.

Xerophthalmia (ocular manifestations of vitamin A deficiency) is prevented and treated by massive dose Vitamin A supplementation (200,000 IU orally) -> (IV).
Cretinism (congenital hypothyroidism and mental/physical stunting) is prevented by universal salt iodization (Iodized salt) -> (I).
Rickets in children (vitamin D deficiency) is prevented by adequate sun exposure (UVB rays promote cutaneous synthesis of cholecalciferol) -> (V).
Severe Acute Malnutrition / PEM is managed during the stabilization phase using WHO therapeutic starter diet F-75 formula (75 kcal/100 ml) -> (III).
Correct matching is (A)-(IV), (B)-(I), (C)-(V), (D)-(III).

Under the National Iron Plus Initiative (NIPI) and Weekly Iron and Folic Acid Supplementation (WIFS) guidelines:

• Pregnant women receive $100\text{ mg}$ elemental iron and $500\,\mu\text{g}$ folic acid daily (not weekly) for $180\text{ days}$.
• Adolescents (children aged $10-19\text{ years}$, both school-going and out-of-school) receive a blue IFA tablet containing $100\text{ mg}$ elemental iron and $500\,\mu\text{g}$ folic acid weekly.
• Children $5-10\text{ years}$ receive $45\text{ mg}$ elemental iron and $400\,\mu\text{g}$ folic acid weekly.
• Children $6-60\text{ months}$ receive $20\text{ mg}$ elemental iron and $100\,\mu\text{g}$ folic acid bi-weekly as liquid syrup.