AS:- Octopus is also called "Devil Fish".
R:- Animals of class crustacea have three pairs of appendages.

Options

A. If both As and R are correct and R is correct explanation of As
B. If both As and R are correct but R is not correct explanation of As
C. If As is correct, R is wrong
D. If both As and R are wrong.

Answer

**Step-by-Step Solution:**

1. **Identify the Assertion and Reason:**
- Assertion (AS): "Octopus is also called 'Devil Fish'."
- Reason (R): "Animals of class Crustacea have three pairs of appendages."

2. **Evaluate the Assertion:**
- The assertion states that the octopus is referred to as "Devil Fish." This is a common name for the octopus due to its appearance and behavior. Therefore, the assertion is **correct**.

3. **Evaluate the Reason:**
- The reason states that animals of class Crustacea have three pairs of appendages. However, in reality, Crustaceans typically have five pairs of appendages (including antennae and walking legs). Thus, this statement is **incorrect**.

4. **Determine the Relationship Between Assertion and Reason:**
- Since the assertion is correct and the reason is incorrect, we need to analyze the options provided in the question to find the correct relationship.

5. **Analyze the Options:**
- Option A: Both assertion and reason are correct, and R is the correct explanation of AS. (Incorrect)
- Option B: Both assertion and reason are correct, but R is not the correct explanation of AS. (Incorrect)
- Option C: Assertion is correct, but R is wrong. (Correct)
- Option D: Both assertion and reason are wrong. (Incorrect)

6. **Conclusion:**
- The correct answer is that the assertion is correct, but the reason is wrong.

**Final Answer:**
- The assertion is correct, and the reason is incorrect.

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