Assertion :- Mutations are main source of evolution.
Reason : Mutation causes variations.

Options

A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.
B. If both Assertion & Reason are trur but Reason is not a correct explanation of the Assertion.
C. If Assertion is True but the Reason is Flase.
D. If both Assertion & Reason are false.

Answer

To analyze the given assertion and reason, we can break it down into a step-by-step solution.

### Step 1: Understand the Assertion
The assertion states that "Mutations are the main source of evolution." This means that mutations, which are changes in the DNA sequence, play a crucial role in the evolutionary process.

### Step 2: Understand the Reason
The reason provided is that "Mutation causes variations." This indicates that mutations lead to differences in the genetic makeup of individuals within a population, which is essential for evolution.

### Step 3: Connect the Assertion and Reason
To determine the relationship between the assertion and the reason, we need to consider how they are linked. The reason explains that mutations create variations, which are necessary for evolution to occur. Therefore, if mutations cause variations, and those variations are acted upon by evolutionary mechanisms (like natural selection), then mutations can indeed be seen as a main source of evolution.

### Step 4: Evaluate the Truth of Both Statements
Both the assertion and the reason are true:
- Mutations are indeed a significant source of genetic variation.
- Variations are essential for the process of evolution.

### Step 5: Determine the Correct Explanation
Since the reason correctly explains the assertion (mutations cause variations, which are crucial for evolution), we conclude that both the assertion and the reason are true, and the reason is the correct explanation of the assertion.

### Final Conclusion
The correct answer is that both the assertion and reason are true, and the reason is the correct explanation of the assertion.

---