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