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
Smell of burnt rope due to poisoning with: AIIMS 14 
Select and explain. 
A. Aluminum phosphide, B. Cannabis, C. Arsenic, D. Cyanide
B: Cannabis
Answer: B: Cannabis 
Explanation: Ans. Cannabis