Which disease does not occur in infants younger than six months ?

Options

A. Kwashiorkor
B. Kwashiorkor and marasmus
C. Marasmus
D. Jaundice.

Answer

To answer the question "Which disease does not occur in infants younger than six months?", we can analyze the provided options based on their causes and how they relate to infants.

### Step-by-Step Solution:

1. **Understanding the Diseases**:
- **Koshyokar**: This disease is caused by insufficient intake of proteins. It can occur if an infant does not receive enough protein in their diet.
- **Morasmus**: This condition arises from inadequate intake of calories. It is characterized by severe malnutrition and can lead to significant weight loss and muscle wasting.
- **Jaundice**: Jaundice can be caused by various factors, including viral infections (like hepatitis) or bacterial infections. It can occur in individuals of any age, including infants.

2. **Analyzing Infants' Diet**:
- Infants younger than six months are typically fed exclusively on breast milk, which is rich in nutrients, including proteins and calories. Therefore, they are less likely to suffer from diseases related to nutritional deficiencies.

3. **Identifying the Disease**:
- Since Morasmus is specifically related to inadequate calorie intake, and given that infants are usually well-fed with breast milk, this disease is unlikely to occur in infants younger than six months.
- Koshyokar, which is related to protein deficiency, could also potentially occur, but the risk is lower due to breastfeeding.
- Jaundice can occur in infants regardless of age due to various infections or conditions affecting the liver.

4. **Conclusion**:
- Based on the analysis, the disease that does not occur in infants younger than six months is **Morasmus**.

### Final Answer:
**Morasmus**