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: Forensic Medicine
Chocolate or copper brown post moem staining is seen in all of the following causes of death, except: 
Select and explain. 
A. Nitrates, B. Aniline dyes, C. Clostridium perfringence, D. Potassium chlorate
C: Clostridium perfringence
Answer: C: Clostridium perfringence 
Explanation: Nitrates, Potassium chlorate, Potassium bicarbonate, Aniline, all produce chocolate or copper brown post-moem staining. Clostridium perfingence causes bronze pigmentation in septic aboion.