Assertion : Alcohols have more boiling point than aldehydes of comparable molecular masses.
Reason : Alcohol molecules have strong hydrogen bonding between them.

Options

A. If both assertion and reason are correct and reason is correct explanation for assertion.
B. If both assertion and reason are correct and reason is not correct explanation for assertion.
C. If assertion is correct but reason is incorrect.
D. If assertion as well as reason are both incorrect.

Explanation

To solve the question regarding the boiling points of alcohols and aldehydes, we will analyze the assertion and reason provided.

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that "Alcohols have more boiling point than aldehydes of comparable molecular masses."
- This is a claim that we need to verify based on the properties of alcohols and aldehydes.

2. **Understanding the Reason**:
- The reason given is "Alcohol molecules have strong hydrogen bonding between them."
- We need to assess whether this statement is true and if it supports the assertion.

3. **Analyzing Alcohols**:
- Alcohols contain an -OH (hydroxyl) group, which allows them to form hydrogen bonds with other alcohol molecules.
- Hydrogen bonding is a strong intermolecular force that significantly increases the boiling point of a substance.

4. **Analyzing Aldehydes**:
- Aldehydes contain a carbonyl group (C=O) and can engage in dipole-dipole interactions.
- While these interactions are stronger than the van der Waals forces present in hydrocarbons, they are weaker than hydrogen bonds.

5. **Comparing Boiling Points**:
- Due to the presence of hydrogen bonding in alcohols, they generally exhibit higher boiling points compared to aldehydes of similar molecular mass, which primarily rely on dipole-dipole interactions.

6. **Conclusion**:
- Since both the assertion and the reason are correct, and the reason explains why the assertion is true, we conclude that the correct answer is:
- **Both assertion and reason are correct, and the reason is the correct explanation for the assertion.**

### Final Answer:
**The correct answer is option A: Both assertion and reason are correct, and the reason is the correct explanation for the assertion.**

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