FOLLOWS here is:Continuous is the synonyms of PERPETUAL.Similarly,Monstrous is the synonyms of Colossal.Hence, the correct ANSWER is "Colossal : Monstrous". WordsTheir MeaningImpedimentबाधाStiffकठोरFierceभयंकरColossalबहुत बड़ा Continous is the synonyms of Perpetual (लगातार), not the ANTONYMS.Some common synonyms of Perpetual are constant, continual, continuous, incessant, and perennial.Some common antonyms of Perpetual are discontinuous, noncontinuous, temporary, IMPERMANENT