In the following question, A statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as.
Assertion (A): At the equilibrium position in the process of adsorption AH = TAS.
Reason (R): Adsorption is accompanied by decrease in surface energy.

Options

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

Explanation

To solve the question, we need to evaluate the two statements: the Assertion (A) and the Reason (R), and determine their correctness and relationship.

### Step-by-Step Solution:

1. **Understanding the Assertion (A)**:
- The assertion states: "At the equilibrium position in the process of adsorption, ΔH = TΔS."
- In thermodynamics, for any process at equilibrium, the change in Gibbs free energy (ΔG) is zero. The relationship is given by the equation:
\[ ΔG = ΔH - TΔS \]
- At equilibrium, since ΔG = 0, we can rearrange the equation:
\[ 0 = ΔH - TΔS \implies ΔH = TΔS \]
- This confirms that the assertion is correct.

2. **Understanding the Reason (R)**:
- The reason states: "Adsorption is accompanied by a decrease in surface energy."
- This statement is also true. When molecules adsorb onto a surface, they occupy positions that reduce the overall surface energy of the system, as the unbalanced forces on the surface molecules are minimized.

3. **Evaluating the Relationship**:
- Both statements A and R are true. However, we need to determine if R correctly explains A.
- The reason for the assertion A (ΔH = TΔS) is based on the condition of Gibbs free energy being zero at equilibrium, not directly due to the decrease in surface energy during adsorption.
- Therefore, while both statements are true, R does not provide the correct explanation for A.

4. **Conclusion**:
- The correct choice is: "Both A and R are true, but R is not the correct explanation of A."

### Final Answer:
- **Both A and R are true, but R is not the correct explanation of A.**