Assertion: On heating, a solid usually change to a liquid and the liquid on further heating change to the gaseous state.
Reason : Arrangement of constituent particles is different in solid, liquid and gaseous state.

Options

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

Explanation

**Step-by-Step Solution:**

1. **Understanding the Assertion:**
- The assertion states that when a solid is heated, it usually changes to a liquid, and when that liquid is further heated, it changes to a gas. This is a fundamental concept in the study of states of matter.
- This process is known as phase transition, where solids melt into liquids and liquids vaporize into gases upon heating.

2. **Evaluating the Reason:**
- The reason provided states that the arrangement of constituent particles is different in solids, liquids, and gases. This is indeed true.
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