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
Stage of analgesia in anaesthesia is ? 
Select and explain. 
A. Stage-1, B. Stage-2, C. Stage-3, D. Stage-4
A: Stage-1
Answer: A: Stage-1 
Explanation: Ans. is 'a' i.e., Stage-1