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
Hipper a sign that demonstrate alternative contraction and dilation of puils is seen in which poisoning? 
Select and explain. 
A. Cannabis poisoning, B. Aconite poisoning, C. Nicotine poisoning, D. Amphetamine overdose
B: Aconite poisoning
Answer: B: Aconite poisoning 
Explanation: Hipper is a classical sign of Aconite poisoning.