This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autonomic nervous system, Subject name: Pharmacology
Antidote of datura poisoning is 
Select and explain. 
A. Neostigmine, B. Pyridostigmine, C. Physostigmine, D. Atropine
C: Physostigmine
Answer: C: Physostigmine 
Explanation: Datura is atropine .antidote is physostigmine because it is a teiary amine which can cross BBB and neutralize central effects produced by atropine Ref: KDT 6th ed pg 101-102