Assertion (A) : Fluorine occurs in nature in the combined state only
Reason R: Fluorine is very reactive element.

Options

A. A & R are true, R is correct explanation of A
B. A & R are true, R is not correct explanation of A
C. A is true, but R is false
D. A is false, but R is true

Explanation

To analyze the given assertion and reason, we can break it down into steps:

### Step 1: Understand the Assertion
The assertion states that "Fluorine occurs in nature in the combined state only." This means that fluorine is not found in its elemental form (F2) in nature but rather in compounds with other elements.

### Step 2: Understand the Reason
The reason provided is that "Fluorine is a very reactive element." This indicates that fluorine readily reacts with other elements to form compounds, which explains why it is not found in its elemental state.

### Step 3: Connect the Assertion and Reason
Since fluorine is indeed a highly reactive element due to its high electronegativity, it tends to form bonds with other elements. This reactivity leads to the formation of various fluorine compounds, which supports the assertion that fluorine is found only in a combined state in nature.

### Step 4: Evaluate the Truth of Both Statements
- **Assertion (A)**: True, because fluorine is not found in its elemental form in nature.
- **Reason (R)**: True, because fluorine's high reactivity is due to its electronegativity, leading it to form compounds.

### Step 5: Determine the Relationship Between A and R
The reason provided (R) explains why the assertion (A) is true. Therefore, both A and R are true, and R is the correct explanation for A.

### Conclusion
Both the assertion and the reason are true, and the reason correctly explains the assertion.

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