Answer: Option B
Answer: (b)One who is celibate does not marry or have sex, because of one’s religious beliefs. (1), (3) and (4) are close choices. But we reject (1) and (3) because they have other meanings too. Profligate and reprobate give a general sense of wastefulness. Such persons may be given to vices, sex being one of them. Thus (1) and (3) can be focussed as an antonym only in absence of (4). A married man, on the other hand, is categorically not celibate.