After the acrimonious debate in the Lok Sabha, some memberas walked out.

Answer: Option A

Bitter : feeling or showing anger, hurt, or resentment because of bad experiences or a sense of unjust treatment.
Lively : full of life and energy; active and outgoing.
Disgusting : arousing revulsion or strong indignation.
Short : measuring a small distance from end to end.
Acrimonious : (typically of speech or discussion) angry and bitter.

Synonym of Acrimonious is Bitter