Choose the wrong enzymatic reaction.

Options

A. (a) Sucrose `overset("Invertase")rarr` Glucose + Fructose
B. (b) Lactose `overset("Lactase")rarr` Glucose + Fructose
C. (c) Maltose `overset("Maltase")rarr` Glucose + Glucose
D. (d) Pepsinogen `overset(HCl)rarr` Pepsin

Explanation

To solve the question "Choose the wrong enzymatic reaction," we will analyze each of the given enzymatic reactions step by step.

### Step-by-Step Solution:

1. **Identify the Enzymatic Reactions**: We have four enzymatic reactions to analyze. They are:
- A: Sucrose → Glucose + Fructose (enzyme: Invertase)
- B: Lactose → Glucose + Fructose (enzyme: Lactase)
- C: Maltose → Glucose + Glucose (enzyme: Maltase)
- D: Pepsinogen → Pepsin (activated by HCl)

2. **Analyze Option A**:
- **Reaction**: Sucrose is broken down into glucose and fructose.
- **Enzyme**: Invertase (also known as sucrase).
- **Correctness**: This reaction is correct because sucrose is indeed a disaccharide made of glucose and fructose.

3. **Analyze Option B**:
- **Reaction**: Lactose is broken down into glucose and fructose.
- **Enzyme**: Lactase.
- **Correctness**: This reaction is incorrect. Lactose is a disaccharide composed of glucose and galactose, not fructose. Therefore, the correct breakdown should be lactose → glucose + galactose.

4. **Analyze Option C**:
- **Reaction**: Maltose is broken down into glucose and glucose.
- **Enzyme**: Maltase.
- **Correctness**: This reaction is correct. Maltose is a disaccharide made up of two glucose units, so the breakdown is accurate.

5. **Analyze Option D**:
- **Reaction**: Pepsinogen is activated to pepsin.
- **Correctness**: This reaction is correct. Pepsinogen is the inactive form of the enzyme pepsin, which is activated in the acidic environment of the stomach by hydrochloric acid.

6. **Conclusion**: After analyzing all the options, we find that the only incorrect enzymatic reaction is option B, where lactose is incorrectly stated to break down into glucose and fructose instead of glucose and galactose.

### Final Answer:
The wrong enzymatic reaction is **Option B**.

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