<prompt> Dibucain number refers to ?Ach cholinestrase activity derangementPotency of muscle relaxantsPotency of general anaestheticsNone  <response>: Ans. is a i.e., Ach chlinestrase activity derangement Dibucain number : Dibucain a local anaesthetic inhibits 80 of normal pseudocholinesterase and 20 of atypical non-functional pseudocholinesterase. Therefore normal dibucain number is 70-80. Dibucain number is used to measure the activity of atypical pseudocholinesterase. 