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: Surgery
In which stage of anaesthesia patient becomes hyperactive: 
Select and explain. 
A. Stage 1, B. Stage 2, C. Stage 3, D. Stage 4
B: Stage 2
Answer: B: Stage 2 
Explanation: Stage I – Analgesia and conscious sedation
Stage II – Stage of delerium
Stage III – Stage of surgical anesthesia

Plane I – Pupils dilate progressively with the depth of anesthesia. Lid reflex, swallowing, retching and vomiting get abolished. Corneal reflex present. Conjunctival reflex is absent. Pharyngeal reflex lost.
Plane II – Eye balls fixed, reflexes arising from the larynx also abolished.
Plane III – Asynchrony between thoracic and abdominal movements. Progressive paralysis of intercostal muscles, pupillary light reflex and the corneal reflex is lost.
Plane IV – Complete intercostal muscle paralysis. Pupils are dilated. Muscles are flaccid.

Stage IV – Stage of respiratory paralysis