In each of the following questions, a statement of Assertion is given followed by corresponding statement of Reason of the statement, mark the correct alternative as directed below.
Assertion: In mitosis, prophase has no sub-stages.
Reason: In meiosis, prophase has six sub-stages.

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

To analyze the given statements, we will break down the assertion and the reason step by step.

### Step 1: Understanding the Assertion
- **Assertion**: "In mitosis, prophase has no sub-stages."
- **Explanation**: This statement is correct. In mitosis, prophase is a single phase without any further subdivisions. It involves the condensation of chromatin into chromosomes, the formation of the mitotic spindle, and the breakdown of the nuclear envelope, but it does not have distinct sub-stages like in meiosis.

### Step 2: Understanding the Reason
- **Reason**: "In meiosis, prophase has six sub-stages."
- **Explanation**: This statement is incorrect. In meiosis, specifically in meiosis I, prophase is divided into five sub-stages: leptotene, zygotene, pachytene, diplotene, and diakinesis. Therefore, the assertion that there are six sub-stages in meiosis is false.

### Step 3: Evaluating the Relationship
- The assertion is true because mitosis does not have sub-stages in prophase.
- The reason is false because meiosis prophase has five, not six, sub-stages.

### Conclusion
Based on the evaluation:
- The assertion is true, but the reason is false.

### Final Answer
The correct alternative is: **Option 3** - The assertion is true but the reason is false.

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