Trypsinogen is activated into trypsin by an enzyme .......X...... Secreted by .......Y...... Choose the option which correctly describes 'X' and 'Y'

Options

A. `{:(,X,Y),((A),"Trypsinase","Small intestine"):}`
B. `{:(,X,Y),((B),"Intestinal Lipase","Small intestine"):}`
C. `{:(,X,Y),((C),"Enterokinse","Intestinal mucosa"):}`
D. `{:(,X,Y),((D),"Steapsin","Small Intestine"):}`

Answer

To solve the question, we need to identify the enzyme that activates trypsinogen into trypsin and the source of that enzyme.

### Step-by-Step Solution:

1. **Understanding Trypsinogen**:
- Trypsinogen is an inactive precursor (zymogen) of the enzyme trypsin. It is secreted by the pancreas as part of pancreatic juice.

2. **Activation of Trypsinogen**:
- Trypsinogen must be activated to become trypsin. This activation is crucial for the digestion of proteins in the small intestine.

3. **Identifying the Enzyme (X)**:
- The enzyme that activates trypsinogen is called **enterokinase** (also known as enteropeptidase). This enzyme catalyzes the conversion of trypsinogen into trypsin.

4. **Identifying the Source (Y)**:
- Enterokinase is secreted by the **intestinal mucosa**, which is the lining of the small intestine. This is where the activation process occurs.

5. **Final Answer**:
- Therefore, 'X' is **enterokinase** and 'Y' is **intestinal mucosa**.

### Conclusion:
The correct option that describes 'X' and 'Y' is:
- **X: Enterokinase**
- **Y: Intestinal mucosa**