Consider the following statements A and B and identify the correct answer: A: Germanium is preferred over silicon in construction of Zener diode B: Germanium have high thermal stability

Options

A. A and B are true
B. A and B are false
C. A is true, B is false
D. A is false,B is true

Answer

To solve the question, we will analyze the statements A and B regarding germanium and silicon in the context of Zener diodes and thermal stability.

### Step-by-Step Solution:

1. **Analyze Statement A**:
- Statement A claims that "Germanium is preferred over silicon in the construction of Zener diodes."
- In reality, silicon is generally preferred over germanium for Zener diodes. This is because silicon has a sharper breakdown voltage and better stability characteristics. Germanium diodes do not maintain a constant breakdown voltage effectively.

**Conclusion for A**: This statement is **false**.

2. **Analyze Statement B**:
- Statement B claims that "Germanium has high thermal stability."
- However, silicon has better thermal stability compared to germanium. Germanium is more sensitive to temperature changes, which affects its performance in electronic devices.

**Conclusion for B**: This statement is also **false**.

3. **Final Conclusion**:
- Since both statements A and B are false, the correct answer to the question is that both statements are incorrect.

### Answer:
Both statement A and B are false.