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: Pediatrics
[{'content': 'Which of the following statements is/are true about ostium secundum ASD \nSelect and explain. \nA. Fixed splitting of 2nd hea sound, B. Narrow splitting of 2nd hea sound, C. Lt axis detion in ECG, D. Shunt murmur prominent', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ostium secundum ASD characterized by wide fixed split second hea sound,ejection systolic murmur in pulmonary area,shunt murmur will be absent. ECG shows right axis detion & right ventricular hyperophy. Ref : Ghai essential of pediatrics, 8th edition, p.no:413', 'role': 'assistant'}]