Gastric juice of infants contains

Options

A. Pepsinogen, lipase, rennin
B. Amylase, rennin, pepsinogen
C. Maltase, pepsinogen, rennin
D. Nuclease, pepsinogen, lipase

Answer

### Step-by-Step Solution:

1. **Understanding Gastric Juice**: Gastric juice is a digestive fluid produced in the stomach. It contains various enzymes and acids that help in the digestion of food.

2. **Gastric Juice in Infants**: In infants, the composition of gastric juice is slightly different compared to adults. The primary function of gastric juice in infants is to digest milk.

3. **Key Enzyme - Renin**: The main enzyme present in the gastric juice of infants is **renin**. Renin is crucial for the digestion of milk protein, specifically casein.

4. **Role of Renin**: Renin acts on casein, the primary protein found in milk, converting it into a more digestible form known as para-casein. This is essential for infants as their primary source of nutrition is milk.

5. **Other Enzymes Present**: In addition to renin, gastric juice in infants may also contain:
- **Pepsinogen**: An inactive form of pepsin, which is activated to digest proteins.
- **Lipase**: An enzyme that helps in the digestion of fats.

6. **Absence of Certain Enzymes**: It is important to note that certain enzymes like amylase (which digests carbohydrates) are not present in the gastric juice of infants.

7. **Conclusion**: Therefore, the gastric juice of infants primarily contains renin, pepsinogen (inactive form), and lipase, with renin being the key enzyme for digesting milk protein.

### Final Answer:
The gastric juice of infants contains renin, pepsinogen, and lipase.

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