| Assertion (A): | The primary function of sweat is to facilitate a cooling effect on body surface. |
| Reason (R): | Sweat excretes out NaCl and small amount of urea also. |
| 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. | Both (A) and (R) are False. |