GRIMGrim=> very serious or gloomy, unattractive, unpleasant, worrying
Right Answer is: A
Grim=> very serious or gloomy, unattractive, unpleasant, worrying
Bustling=> to be full of activity (used for a place)
Rapacious=> Having or showing a strong or excessive desire to acquire money or possess things; greedy: “dishonest
Furtive=> secret, done in quiet and secret way to avoid attention
Cogent=> clear, logical, and convincing
Thus, option A is the word that expresses the opposite meaning.