When breast feeding is replaced by less nutritive food low in proteins and calories, the infants below the age of one year are likely to suffer from

Options

A. Pellagra
B. Marasmus
C. Rickets
D. Kwashiorker

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question states that breastfeeding is replaced by less nutritive food that is low in proteins and calories. This implies that the infant's nutritional intake is insufficient.

2. **Identifying the Age Group**: The question specifies infants below the age of one year. This is crucial because different malnutrition-related diseases can affect different age groups.

3. **Types of Malnutrition**: There are two primary forms of malnutrition related to protein and calorie deficiency:
- **Merasmus**: This condition is characterized by a deficiency in both protein and calories. It typically affects infants and young children who are not receiving adequate nutrition.
- **Kwashiorkor**: This condition is primarily due to protein deficiency, but the caloric intake may be adequate. It usually affects children over the age of one year.

4. **Symptoms of Merasmus**: In Merasmus, the infant appears very thin, with prominent ribs and limbs. The child may exhibit signs of severe malnutrition, such as stunted growth and a lack of energy.

5. **Symptoms of Kwashiorkor**: In contrast, Kwashiorkor is characterized by edema (swelling) in the body, particularly in the abdomen and limbs. This condition is not applicable to infants under one year.

6. **Conclusion**: Given that the question specifies infants under one year of age and indicates a lack of both proteins and calories, the most likely condition they would suffer from is **Merasmus**.

### Final Answer:
Infants below the age of one year are likely to suffer from **Merasmus** when breastfeeding is replaced by less nutritive food low in proteins and calories.

---