<prompt> Which of the following is an example of idiosyncratic reaction?Captopril - dry coughIsoniazid - hepatitisHaloperidol - extrapyramidal side effectsChloramphenicol - aplastic anemia  <response>: Ans. isdi.e., Chloramphenicol - aPlastic anemiaRef: KDT Pe p. 851 Idiosyncratic reactions e.g.:Barbiturates cause excitement and mental confusion in some individuals.Quininequinidine cause cramps, diarrhoea, purpura, asthma and vascular collapse in some patients.Chloramphenicol produces non dose-related serious aplastic anaemia in rare individuals. 