The digestive enzymes are able to digest meat taken in diet but does not digest the cells which are producing them. It can be explaned as follows.

Options

A. Cells of intestine have a protective coat
B. Cells are digested but repaired immediately
C. Enzymes are secreted in inactive form
D. Enzymes become inactive on contact of cells

Answer

### Step-by-Step Solution:

1. **Understanding Digestive Enzymes**: Digestive enzymes are hydrolytic enzymes that catalyze the breakdown of food. They help in digesting larger macromolecules into smaller, absorbable units.

2. **Function of Digestive Enzymes**: These enzymes work specifically on their substrates. For example, proteases break down proteins, lipases break down fats, and amylases break down carbohydrates.

3. **Secretion of Enzymes**: Digestive enzymes are secreted in an inactive form (also known as zymogens or proenzymes). This is crucial because if they were active while being produced, they would digest the cells that produce them.

4. **Activation of Enzymes**: The inactive enzymes become active when they come into contact with stomach acid or other specific conditions in the digestive tract. This ensures that they only act on the food substances and not on the cells that produce them.

5. **Specificity of Enzymes**: Each enzyme is specific to its substrate. This means that digestive enzymes will only act on the food components (like proteins in meat) and not on the cells of the intestine that produce them.

6. **Conclusion**: Therefore, the reason digestive enzymes can digest meat but do not digest the cells producing them is that they are secreted in an inactive form and only activated in the presence of specific conditions (like stomach acid).

### Final Answer:
The correct explanation is that digestive enzymes are secreted in inactive form and become active only when they come into contact with stomach acid, allowing them to digest food without harming the cells that produce them.

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