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
Pin point pupil is seen in all except 
Select and explain. 
A. Pontine hemorrhage, B. Organophosphorus poisoning, C. Opium poisoning, D. Barbiturates poisoning
D: Barbiturates poisoning
Answer: D: Barbiturates poisoning 
Explanation: Pin point pupil can be caused by : Opioids (morphine), organophosphates, phenothiazines, clonidine, mushroom poisoning, chloral hydrate, carbolic acid and pontine hemorrhage.