Assertion: Plastics are resistant to weather conditions.
Reason: Plastics are quite expensive and strong.

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

**Step-by-Step Solution:**

1. **Understand the Assertion**: The assertion states that "Plastics are resistant to weather conditions." This means that plastics can withstand various environmental factors such as rain, sunlight, and temperature changes without degrading or losing their properties.

2. **Evaluate the Reason**: The reason given is "Plastics are quite expensive and strong." We need to analyze if this reason supports the assertion.

3. **Assess the Cost of Plastics**: Plastics are generally known to be low-cost materials. They are produced in large quantities, which makes them affordable. Therefore, the statement that plastics are "quite expensive" is incorrect.

4. **Evaluate the Strength of Plastics**: While some plastics can be strong, many types are considered to have moderate strength. They are not as strong as metals or other materials, but they are not weak either. Thus, the statement that plastics are "strong" is somewhat misleading.

5. **Conclusion**: Since the assertion is true (plastics are resistant to weather conditions), but the reason is false (plastics are not expensive and their strength is moderate), we conclude that the assertion is true while the reason is false.

6. **Final Answer**: Therefore, the correct option is that the assertion is true, but the reason is false.

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