This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hemodynamics, Subject name: Pathology
Heinz bodies are composed of? 
Select and explain. 
A. DNA, B. RNA, C. Iron, D. Denatured haemoglobin
D: Denatured haemoglobin
Answer: D: Denatured haemoglobin 
Explanation: Summary of Inclusions in RBCsHowell jolly bodiesDNABasophilic stipplingRNA remnantsSiderotic granules/ pappenhiemer bodiesIronHeinz bodiesDenatured Haemoglobin