This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anesthesia for Cardiovascular Disease and Surgery, Subject name: Anaesthesia
Induction agent of choice in a child with cyanotic heart disease - 
Select and explain. 
A. Thiopentone, B. Ketamine, C. Halothane, D. Midazolam
B: Ketamine
Answer: B: Ketamine 
Explanation: Ans. is 'b' i.e., Ketamine o In cyanotic heart disease (right to left shunt), systemic vascular resistance should be increased by anaesthetics - ketamine is the anaesthetic of choice.o In acyanotic heart disease (left to right shunt), systemic vascular resistance should be decreased - volatile anaesthetics (isoflurane, sevoflurane or desflurane) should be used.