<prompt> A Patient has hypersensitivity to neostigmine. He has to undergo upper abdominal surgery. Muscle relaxant of choice is:PancuroniumRopacuroniumVecuroniumAtracurium  <response>: Ans. D. AtracuriumAtracurium undergo spontaneous degradation in plasma called as Hoffman degradation.Atracurium is relaxant of choice if reversal agent is contraindicated.Other muscle relaxants:mentioned in question require reversal with neostigmine but Ne can not use neostigmine due to hypersensitivity, so can not use in this patient 