In mammals, milk is digested by action of `,`

Options

A. Rennin
B. Amylase
C. Intestinal bacteria
D. Invertase

Answer

To solve the question "In mammals, milk is digested by the action of," we need to identify the correct enzyme responsible for the digestion of milk in mammals, particularly in young mammals.

### Step-by-Step Solution:

1. **Understanding Milk Digestion in Mammals**:
- Milk digestion primarily occurs in the stomach of mammals, especially in young mammals that are still nursing.

2. **Identifying the Enzymes**:
- The options given are:
- A. Renin
- B. Amylase
- C. Intestinal bacteria
- D. In potase

3. **Analyzing Each Option**:
- **A. Renin**: This enzyme is secreted by the gastric glands in the stomach of young mammals. It plays a crucial role in coagulating milk by converting casein into paracasein in the presence of calcium. This process is essential for the digestion of milk.
- **B. Amylase**: This enzyme is responsible for the breakdown of carbohydrates, not proteins or milk. It is primarily found in saliva and the pancreas.
- **C. Intestinal bacteria**: While they do play a role in digestion, they are not primarily responsible for the initial digestion of milk in young mammals.
- **D. In potase**: This option seems to be a typographical error or a misnomer, as it does not correspond to any known enzyme involved in milk digestion.

4. **Conclusion**:
- Based on the analysis, the enzyme responsible for milk digestion in young mammals is **Renin**. Therefore, the correct answer is **A. Renin**.

### Final Answer:
In mammals, milk is digested by the action of **Renin**.