Answer:a. Using a solution of alcohol and acetic acid to dry and acidify the ear.
Explanation:
The otitis externa is a medical condition which causes the inflammation of the external ear canal. This occurs due to repeated exposure of the water to the ear canal.
This condition is responsible for pain, and generation of the debris in the ear. One can get rid of this condition by the use of acetic acid or alcohol drops which can change the pH of the ear canal. This will dry and acidify the ear.
