Assertion : Annual rings are used to calculate the age of tree.
Reason : Secondary growth is not found in Bamboo

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion.
B. If both assertion and reason are true but reason is not the correct explanation of assertion
C. If assertion is true but reason is false
D. If both assertion and reason are false.

Answer

To solve the question, we will analyze the assertion and reason step by step.

### Step 1: Analyze the Assertion
- **Assertion**: "Annual rings are used to calculate the age of tree."
- **Explanation**: Annual rings, also known as growth rings, are formed due to the seasonal growth of trees. Each year, trees produce a new layer of wood, which consists of two parts: spring wood (lighter in color) and autumn wood (darker in color). By counting these rings, one can determine the age of the tree.

### Step 2: Analyze the Reason
- **Reason**: "Secondary growth is not found in Bamboo."
- **Explanation**: Bamboo is a type of monocotyledon (monocot) plant. Unlike dicots, monocots do not have a vascular cambium, which is responsible for secondary growth (the increase in thickness of stems and roots). Therefore, bamboo does not exhibit secondary growth.

### Step 3: Determine the Relationship
- Both the assertion and the reason are true statements.
- However, the reason provided does not explain the assertion. The assertion about annual rings being used to calculate the age of a tree is based on the presence of growth rings formed by secondary growth in trees, while the reason discusses the lack of secondary growth in bamboo, which is unrelated to the assertion.

### Conclusion
- Since both the assertion and reason are true, but the reason is not the correct explanation for the assertion, the correct answer is that both statements are true, but the reason does not explain the assertion.

### Final Answer
- The correct option is: "Both assertion and reason are true, but the reason is not the correct explanation of the assertion."

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