In this section an underlined word has been used variously in three sentences S1, S2 and S3. You are required to determine in how many sentences has the word been used correctly. S1: The moribund state of the decaying colony depressed everyone. S2: The strength of the collective remained moribund despite attempts at scuttling unity. S3: Driven by a common purpose, the moribund group decided it would prevail notwithstanding of the adverseness of the situation.

Moribund means at the point of death, in a state of terminal decline, or lacking vitality. In S1, describing a decaying colony as moribund correctly applies the meaning of being near death/declining. In S2, the collective strength remaining moribund (in decline) despite efforts to break unity is also correct usage. In S3, calling a group 'driven by common purpose' that 'decided it would prevail' moribund is contradictory — a group with vigor and determination cannot simultaneously be moribund. Therefore the word is correctly used in 2 sentences, making the answer (b) 2.