A: Durability of a polymer is not altogether an advantage.
R: The enormous increase in the use of thrown away the packaging material poses a serious waste disposal problem.

Options

A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark 1.
B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark 2.
C. If Assertion is true statement but Reason is false, then mark 3.
D. If both Assertion and Reason are false statements the mark 4.

Answer

To analyze the assertion and reason provided in the question, we can break down the solution into several steps:

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that "the durability of a polymer is not altogether an advantage." This implies that while durability is generally considered a positive trait, it can also lead to negative consequences.

**Hint**: Consider the implications of durability in terms of environmental impact.

2. **Understanding the Reason**:
- The reason provided is that "the enormous increase in the use of thrown away packaging material poses a serious waste disposal problem." This suggests that the durability of polymers contributes to waste management issues, particularly with packaging materials that are not biodegradable.

**Hint**: Think about how long-lasting materials can affect waste accumulation.

3. **Connecting Assertion and Reason**:
- Both the assertion and the reason are true. The durability of polymers means they do not break down easily in the environment, leading to increased waste. This is particularly evident in packaging materials, which are often used once and discarded.

**Hint**: Reflect on how single-use items contribute to long-term waste.

4. **Evaluating the Relationship**:
- The reason explains the assertion effectively. The durability of polymers, while beneficial in many applications, leads to significant environmental challenges due to the accumulation of non-biodegradable waste.

**Hint**: Consider how the benefits of polymers can turn into drawbacks in waste management.

5. **Conclusion**:
- Since both the assertion and the reason are true, and the reason provides a correct explanation for the assertion, we conclude that the statement is valid. The first option is correct: the reason is the correct explanation of the assertion.

**Hint**: Summarize the relationship between durability and waste disposal issues to reinforce your understanding.

### Final Answer:
Both the assertion and reason are true, and the reason is the correct explanation for the assertion. Thus, the statement is valid.