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: Morphine, organophosphates and pontine hemorrhage cause miosis (constriction of pupil).
Dhatura causes mydriasis (dilatation of pupil).