Synonym of GERMANE

Answer: Option B

Cruel : wilfully causing pain or suffering to others, or feeling no concern about it.
Relevant : closely connected or appropriate to what is being done or considered.
Obstinate : stubbornly refusing to change one's opinion or chosen course of action, despite attempts to persuade one to do so.
Smart : (of a person) clean, tidy, and well dressed.
Germane : relevant to a subject under consideration.

Synonym of Germane is Relevant