Correct option is D
Pugnacious - eager or quick to argue, quarrel, or fight.
Synonyms-
truculent, approximate, raspy, unsmooth, uncut, hard-boiled.
Antonyms – nonaggressive, tender, unaggressive.
Meaning of other words:
Succulent- (of food) tender, juicy, and tasty.
Germane - relevant to a subject under consideration.
Sagacious- having or showing keen mental discernment and good judgement; wise or shrewd.