Assertion (A): Metals like sodium and potassium are always found in combined state in nature.
Reason (R): These metals are highly reactive.

Options

A. Both A and R are true and R is the correct explanation of A.
B. Both A and Rare true and R is the not the correct explanation of A
C. A is true but R is false
D. A is true but R is false

Explanation

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

### Step 1: Understanding the Assertion
**Assertion (A):** Metals like sodium and potassium are always found in a combined state in nature.

- Sodium (Na) and potassium (K) are both alkali metals, which means they are highly reactive and do not exist freely in nature. Instead, they are typically found in compounds, such as sodium chloride (NaCl) and potassium chloride (KCl).

### Step 2: Understanding the Reason
**Reason (R):** These metals are highly reactive.

- Sodium and potassium are indeed highly reactive due to their electronic configuration. They have one electron in their outermost shell, which they can easily lose to achieve a stable noble gas configuration. This high reactivity leads them to readily combine with non-metals, such as chlorine, to form ionic compounds.

### Step 3: Establishing the Relationship
- The assertion states that sodium and potassium are found in a combined state, and the reason given is that they are highly reactive. The reason directly supports the assertion because their high reactivity is the reason why they do not exist in a free state but rather in combined forms.

### Conclusion
- Both the assertion and reason are correct, and the reason provided is the correct explanation for the assertion. Therefore, the conclusion is that both the assertion (A) and reason (R) are true, and R is the correct explanation of A.

### Final Answer:
- **Assertion (A): True**
- **Reason (R): True**
- **Explanation:** R is the correct explanation of A.

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