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: Anaesthesia
To counter central anticholinergic effect, drug used is: 
Select and explain. 
A. Physostigmine, B. Atropine, C. Neostigmine, D. Hyoscine
A: Physostigmine
Answer: A: Physostigmine 
Explanation: Physostigmine