This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anesthesia, Subject name: Pharmacology
Which of the following agents is most commonly used to induce anaesthesia 
Select and explain. 
A. Thiopentone sodium, B. Methohexitone sodium, C. Propofol, D. Etomidate
A: Thiopentone sodium
Answer: A: Thiopentone sodium 
Explanation: Thiopentone is an ultra sho acting barbiturate which she administered IV rapidly induces hypnosis and anesthesia without analgesia. Onset of action is quick,induction smooth rapid and unpleasant. Methohexitone is similar to thiopentone but is not preferred due to its toxicity . Etomidate is used in cardiovascular patients. From Padmaja 4th edition Page no 194,195