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
Train of four is characteristically used in concern with – 
Select and explain. 
A. Malignant hyperthermia, B. Non–depolarizing neuromuscular blockers, C. Mechanical ventilation, D. To check hemodynamic parameters
B: Non–depolarizing neuromuscular blockers
Answer: B: Non–depolarizing neuromuscular blockers 
Explanation: TO4 is used for monitoring of neuro-muscular block during anaesthesia.