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
Poisoning with all the following causes constriction of the pupils except: 
Select and explain. 
A. Dhatura, B. Morphine, C. Organophosphorus compounds, D. Pontine hemorrhage
A: Dhatura
Answer: A: Dhatura 
Explanation: A i.e. Dhatura In aconite poisoning pupils alternatively contract & dilate (hippus) but remain dilated in later stages.Q In Barbiturate the pupils are constrict but respond to light & in terminal stage becomes dilated.