This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Poisoning, Subject name: Forensic Medicine
Pupils alternatively contract and dilate known as hippus sign, is seen in 
Select and explain. 
A. Arsenic poisoning, B. Aconite poisoning, C. Atropine poisoning, D. Albinoria
B: Aconite poisoning
Answer: B: Aconite poisoning 
Explanation: Aconite poisoning occular: pupils show alternate constriction and dilatation. This is called hippus. In later stages, pupils will become widely dilated with dimness of vision and dipolopia. Ref: FORENSIC MEDICINE AND TOXICOLOGY Dr PC IGNATIUS THIRD EDITION PAGE 470