Select the most appropriate option to fill in the blank.
For years, people afflicted with the itchy skin condition used stinky coal tar derivatives to ________ their symptoms.

Correct option is D

The correct option to fill in the blank is (d) alleviate.
Alleviate: To reduce pain or difficulty; to make suffering less severe. (Hindi: कम करना, शांत करना)
Example: The medicine helped alleviate her headache.
Context: Used in medical and treatment contexts to indicate symptom relief.
Meanings of other options:
• Obviate – To prevent by taking action beforehand. (निवारण करना)
• Refer – To direct someone to a source. (संदर्भित करना)
• Deviate – To move away from a course. (भटकना)