This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
Which of the following is an example of idiosyncratic reaction? 
Select and explain. 
A. Captopril - dry cough, B. Isoniazid - hepatitis, C. Haloperidol - extrapyramidal side effects, D. Chloramphenicol - aplastic anemia
D: Chloramphenicol - aplastic anemia
Answer: D: Chloramphenicol - aplastic anemia 
Explanation: Ans. is'd'i.e., Chloramphenicol - aPlastic anemia(Ref: KDT P/e p. 851) Idiosyncratic reactions e.g.:Barbiturates cause excitement and mental confusion in some individuals.Quinine/quinidine cause cramps, diarrhoea, purpura, asthma and vascular collapse in some patients.Chloramphenicol produces non dose-related serious aplastic anaemia in rare individuals.