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
A body is brought for autopsy with history of poisoning. On postmoem examination, there is dark brown postmoem staining and garlic odour in stom-ach. In this case the poisoning is most likely due to 
Select and explain. 
A. Hydrocyanic acid., B. Carbon dioxide, C. Aniline dye., D. Phosphorus.
D: Phosphorus.
Answer: D: Phosphorus. 
Explanation: D i.e. Phosphorus