Assertion : Halogens do not occur in free state.
Reason : Halogens are highly reactive.

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 but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false
D. If the assertion and reason both are false.

Explanation

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

### Step 1: Understanding the Assertion
The assertion states that "Halogens do not occur in free state." This means that halogens, which include elements like fluorine (F), chlorine (Cl), bromine (Br), and iodine (I), are not found in nature as individual, uncombined atoms.

### Step 2: Understanding the Reason
The reason given is that "Halogens are highly reactive." This indicates that halogens readily react with other elements, particularly metals and non-metals, to form compounds rather than existing as free elements.

### Step 3: Linking the Assertion and Reason
To determine if the assertion is true based on the reason, we need to consider the relationship between the reactivity of halogens and their occurrence in a free state. Halogens have seven valence electrons and require one additional electron to achieve a stable electron configuration, which makes them highly reactive. This high reactivity means they tend to form bonds with other elements rather than remaining uncombined.

### Step 4: Conclusion
Both the assertion and the reason are true. The assertion is correct because halogens do not exist in a free state due to their high reactivity, which is accurately described in the reason. Therefore, the reason correctly explains why the assertion is true.

### Final Answer
- **Assertion**: True
- **Reason**: True
- **Conclusion**: The reason is a valid explanation for the assertion.

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