| Assertion (A): | Sound waves in a gas are pressure waves, but these are also accompanied by changes in local temperature. |
| Reason (R): | Sound waves are propagated in gas through an adiabatic process and hence accompanied by temperature variations. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |