Q. Most common type of VSD is? A. Muscular B. Perimembranous C. Inlet D. Outlet Answer: B. Perimembranous Explanation: Perimembranous VSD is most common (70%), followed by muscular VSD (24%), doubly committed subarterial VSD (6.4%) and the least common is inlet type of VSD (5.4%). Reference: https://www.researchgate.net/publication/312590503_Frequency_of_Types_of_Ventricular_Septal_Defect_in_Cardiology
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