Assertion : Burning of coal is a spontaneous process.
Reason : Coal when ignited burns of its own accord without any outside assistance.

Options

A. If both Assertion and Reason are CORRECT and Reason is the CORRECT explanation of the Assertion.
B. If both Assertion and Reason are CORRECT but Reason is not the CORRECT explanation of the Assertion.
C. If Assertion is CORRECT but Reason is INCORRECT.
D. If Assertion is INCORRECT but Reason is CORRECT.

Explanation

To solve the question, we need to analyze the assertion and the reason provided.

### Step-by-Step Solution:

1. **Understanding the Assertion**: The assertion states that "Burning of coal is a spontaneous process."
- A spontaneous process is defined as one that occurs naturally without needing to be driven by an external force once initiated.

2. **Understanding the Reason**: The reason states that "Coal when ignited burns of its own accord without any outside assistance."
- This means that once coal is ignited, it continues to burn without needing any additional energy or assistance.

3. **Connecting Assertion and Reason**:
- To determine if the assertion is true, we consider the nature of the burning of coal. When coal is ignited (for example, by a flame), it starts a combustion reaction.
- After the initial ignition, the combustion continues on its own due to the heat generated from the reaction, which is characteristic of a spontaneous process.

4. **Conclusion**:
- Both the assertion and the reason are correct. The burning of coal is indeed a spontaneous process because it continues to burn without external assistance once it has been ignited.
- Furthermore, the reason provided explains why the assertion is true.

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

---