This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Acyanotic congenital hea diseases, Subject name: Pediatrics
[{'content': 'In septum primum type of ASD overburden occurs in which chamber? \nSelect and explain. \nA. RA + RV, B. LA + LV, C. RA + LA, D. LA', 'role': 'user'}, {'content': 'Answer: A \nExplanation: - In ASD (ostium primum as well as secundum) overload of Right atrium and right ventricle occurs due to left to right shunting of blood. - Left atrium & Left ventricle enlargement - VSD, PDA - Left atrium enlargement - Mitral stenosis', 'role': 'assistant'}]