Assertion :-Analogous organs show common ancestory.
Reason :-Analogous organ show evolution.

Options

A. If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion, then mark (1)
B. If both Assertion and Reason are true ,but the Reason is not the correct explanation of the Assertion, then mark (2).
C. If Assertion is true, but Reason is false , then mark (3)
D. If both Assertion and Reason are false. , then mark (4)

Answer

To solve the question regarding the assertion and reason about analogous organs, we can follow these steps:

### Step 1: Understand the Assertion
The assertion states that "Analogous organs show common ancestry." We need to evaluate whether this statement is true or false.

- **Explanation**: Analogous organs are those that perform similar functions but have different structural origins and do not share a common ancestor. For example, the wings of birds and insects serve the same function (flight) but evolved independently.

**Hint**: Recall the definition of analogous organs and their characteristics.

### Step 2: Understand the Reason
The reason provided is "Analogous organs show evolution." We need to determine if this statement is true or false.

- **Explanation**: This statement is true because analogous organs arise due to convergent evolution, where different species adapt to similar environmental challenges, leading to the development of similar traits despite their different evolutionary paths.

**Hint**: Consider the concept of convergent evolution and its implications on the development of analogous organs.

### Step 3: Analyze the Relationship Between Assertion and Reason
Now that we have evaluated both the assertion and the reason, we need to check if the reason correctly explains the assertion.

- **Explanation**: The assertion is false (analogous organs do not show common ancestry), while the reason is true (analogous organs do show evolution). Since the assertion is incorrect, it cannot be explained by the reason.

**Hint**: Think about whether a true reason can justify a false assertion.

### Step 4: Conclusion
Based on the evaluations:
- The assertion is false.
- The reason is true.

According to the options provided in the question:
- If assertion is true and reason is true, mark 1.
- If both are true but reason does not explain assertion, mark 2.
- If assertion is true and reason is false, mark 3.
- If both are false, mark 4.

Since the assertion is false and the reason is true, we conclude that the correct answer is option 3.

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