A: Placental wolf and Tasmanian wolf (a marsupial) show convergent evolution.
R: Like marsupials placental mammals in other parts of world also exhibit adaptive radiation in evolving into varieties of such placental mammals each of which appears to be similar to a corresponding marsupial.

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 falses statements, then mark (4)

Answer

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that the placental wolf and the Tasmanian wolf show convergent evolution.
- Convergent evolution occurs when different species evolve similar traits or functions independently, often due to similar environmental pressures, despite not sharing a common ancestor.

2. **Identifying the Types of Mammals**:
- The placental wolf is a placental mammal (eutherian), while the Tasmanian wolf is a marsupial.
- Both belong to the class Mammalia but have different reproductive strategies and evolutionary histories.

3. **Explaining Convergent Evolution**:
- Since the placental wolf and Tasmanian wolf do not share a common ancestor but exhibit similar adaptations (like physical features or behaviors), they are examples of convergent evolution.
- This means that they have developed similar traits as a response to similar environmental challenges.

4. **Understanding the Reasoning**:
- The reasoning states that placental mammals, like marsupials, undergo adaptive radiation, leading to the evolution of various forms that resemble corresponding marsupials.
- Adaptive radiation occurs when a single ancestral species rapidly diversifies into a variety of forms to adapt to different environments.

5. **Connecting the Assertion and Reasoning**:
- The reasoning provides a valid explanation for the assertion. It clarifies that the similarity between the placental and Tasmanian wolves is due to adaptive radiation, which leads to convergent evolution.
- Both statements are true and the reasoning correctly explains why convergent evolution occurs in this case.

6. **Conclusion**:
- Therefore, the correct answer is that both the assertion and reasoning are true, and the reasoning is the correct explanation of the assertion.