Assertion : T, P and V are state variables or state functions.
Reason : Their values depends on the state of the system and how it is reached.

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 will break it down step by step.

### Step 1: Understand the Assertion
The assertion states that Temperature (T), Pressure (P), and Volume (V) are state variables or state functions.

**Explanation**:
- State functions are properties that depend only on the current state of the system, not on how the system reached that state.
- Temperature, Pressure, and Volume are indeed state functions because their values are determined solely by the current state of the system.

### Step 2: Understand the Reason
The reason states that the values of T, P, and V depend on the state of the system and how it is reached.

**Explanation**:
- This statement is misleading. While T, P, and V are indeed dependent on the state of the system, they do not depend on the path taken to reach that state.
- State functions are independent of the process; they only depend on the initial and final states.

### Step 3: Conclusion
Based on the analysis:
- The assertion is correct: T, P, and V are state functions.
- The reason is incorrect: The values of T, P, and V do not depend on how the system reached its current state.

### Final Answer
- Assertion: True
- Reason: False