Assertion: In potato tubers stem is edible.
Reason: Potato tubers are full of stored food material which bear leaves and fruits on them.

Options

A. If both Assertion and Reason are true and Reason is a correct explanation of the Assertion.
B. If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion.
C. If Assertion is true but Reason is talse.
D. If both Assertion and Reason are false.

Answer

### Step-by-Step Solution:

1. **Understanding the Assertion**: The assertion states that "In potato tubers, the stem is edible." This is true because potato tubers are indeed modified stems that store starch and are consumed as food.

2. **Analyzing the Reason**: The reason given is "Potato tubers are full of stored food material which bear leaves and fruits on them." This statement is misleading. While potato tubers do store food, they do not bear leaves and fruits. Instead, they have buds from which new plants can grow through vegetative propagation.

3. **Evaluating the Truth of the Statements**:
- The assertion is **true**: Potato tubers are edible and are modified stems.
- The reason is **false**: Potato tubers do not bear leaves and fruits; they have buds for new plant growth.

4. **Conclusion**: Since the assertion is true and the reason is false, the correct answer is that the assertion is true and the reason is false.

### Final Answer:
- The assertion is true, and the reason is false.