Assertion: Life originated in water.
Reason: Primitive waterbodies were alkaline.

Options

A. If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion
B. If both Assertion and Reason are true and the Reason is not the correct explanation of the Assertion.
C. If Assertion is true but the Reason is false.
D. If both Assertion and Reason are false.

Answer

### Step-by-Step Solution

1. **Understanding the Assertion**: The assertion states that "Life originated in water." This is a widely accepted scientific view supported by various experiments, including the famous Miller-Urey experiment, which demonstrated that organic compounds could form in conditions similar to those of early Earth.

**Hint**: Consider the experiments that support the idea of life beginning in aquatic environments.

2. **Understanding the Reason**: The reason provided is that "Primitive water bodies were alkaline." This refers to the chemical nature of early water bodies, which were likely to contain various minerals and compounds that made them alkaline. Alkaline conditions could have facilitated the formation of organic molecules necessary for life.

**Hint**: Think about how the chemical composition of early Earth environments could influence the formation of life.

3. **Evaluating the Relationship**: Now, we need to evaluate whether the reason correctly explains the assertion. The assertion is true as life did originate in water, and the reason is also true because alkaline conditions in primitive water bodies could have supported the chemical reactions needed for life to form.

**Hint**: Analyze whether the alkaline nature of water bodies contributes to the process of life formation.

4. **Conclusion**: Since both the assertion and the reason are true, and the reason provides a correct explanation for the assertion, we conclude that both statements are correct and the reason is the correct explanation of the assertion.

**Hint**: Reflect on how the two statements are interconnected and support each other.

### Final Answer
Both the assertion and the reason are true, and the reason is the correct explanation of the assertion.