This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Medicine
[{'content': 'Component of Fallots tetralogy is \nSelect and explain. \nA. Left axis detion, B. Left ventrucular hyperophy, C. VSD, D. Blalock taussig shunt is between pulmonary aery & subclan aery', 'role': 'user'}, {'content': "Answer: C \nExplanation: The four components of the tetralogy of Fallot are malaligned VSD, obstruction to RV outflow, aoic override of the VSD, and RV hyperophy due to the RV's response to aoic pressure the large VSD. ( Harrison&;s principle of internal medicine,18th edition,pg no. 1926)", 'role': 'assistant'}]