The question is asking about which Ayurvedic preparation involves fermentation. Let's evaluate the options given:
Conclusion: Since "Aristas and Asavas" are known for being prepared through fermentation, the correct answer is clearly "Aristas and Asavas". This distinguishes them from the other options, which do not involve fermentation.

| Column I: Ayurvedic formulations | Column II: Process of property | ||
| A | Bhasma | I | Semisolid |
| B | Arista | II | Calcination |
| C | Churna | III | Alcohol generation |
| D | Lehya | IV | Dry powder |
| V | Decoction |
List I | List II | ||
|---|---|---|---|
| A | \(\Omega^{-1}\) | I | Specific conductance |
| B | \(∧\) | II | Electrical conductance |
| C | k | III | Specific resistance |
| D | \(\rho\) | IV | Equivalent conductance |
List I | List II | ||
|---|---|---|---|
| A | Constant heat (q = 0) | I | Isothermal |
| B | Reversible process at constant temperature (dT = 0) | II | Isometric |
| C | Constant volume (dV = 0) | III | Adiabatic |
| D | Constant pressure (dP = 0) | IV | Isobar |