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
[{'content': 'Hippus is seen in which poisoning \nSelect and explain. \nA. Abrus, B. Aconite, C. Alcohol, D. Dhatura', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Hippus, also known as pupillary athetosis, is a spasmodic, repetitive oscillation in the pupil size, with alternating constriction and dilation of the pupil diameter about 1 to 2 millimeters every five seconds, without relation to the intensity of ambient lighting, emotions of the patient, or focal length of the patient. Hippus has been classically been noted as a sign of Aconite poisoning. Ref: Krishan Vij textbook of forensic medicine, 5th edition pg : 527,528', 'role': 'assistant'}]