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
In a 5 year old child, instead of the physiological splitting of second hea sound, expected only during inspiration, a wide and a fixed split of S2 is heard, both during inspiration, as well as expiration. Condition associated with this is? 
Select and explain. 
A. Atrial septal defect, B. Ventricular septal defect, C. Mitral regurgitation, D. Pulmonary stenosis
A: Atrial septal defect
Answer: A: Atrial septal defect 
Explanation: WIDE FIXED SPLIT OF S2 IS SEEN IN: ASD Right Bundle Branch Block TAPVC WIDE VARIABLE SPITTING OF S2 IS SEEN IN: Pulmonic stenosis VSD Mitral regurgitation