Political differences introduced a note of discord into their relationship.

A. tranquility

B. familiarity

C. concord

D. benevolence

Answer: Option C

Solution(By Examveda Team)

Discord : disagreement between people.
Tranquility : the quality or state of being tranquil; calm.
Familiarity : close acquaintance with or knowledge of something.
Concord : agreement or harmony between people or groups.
Benevolence : the quality of being well meaning; kindness.

Antonym of Discord is Concord