This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Toxicology - 3, Subject name: Forensic Medicine
The active principle of this poison is 
Select and explain. 
A. Strychnine, B. Conine, C. Aconitine, D. Cannabinol
A: Strychnine
Answer: A: Strychnine 
Explanation: This is a image of nuxvomica Fatal does is one crushed seed. It has three active principle = strychnine, brucine and loganine.