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

bitter
lively
disgusting
short

The correct answer is A. bitter.

An acrimonious debate is a heated argument that is full of anger and resentment. It is likely that the members who walked out were feeling bitter and angry after the debate.

The other options are not as likely to be the reason why the members walked out. A lively debate is one that is full of energy and excitement. A disgusting debate is one that is offensive or revolting. A short debate is one that is brief.

It is possible that the members walked out because the debate was lively or disgusting, but it is more likely that they walked out because they were feeling bitter.