Multiple choice Pick the odd one out. Vipers, peacocks, mice, rabbits and wasps Vipers Peacocks Mice Rabbits Wasps Reveal answer Fill a bubble to check yourself B Correct answer Explanation Correct. The common factor is the collective noun – nest – used with four of the five given options viz. vipers, mice, rabbits and wasps. The odd one out is the word - peacocks. The collective noun for peacocks is – pride, muster or ostentation.