You are incorrect - aortic valve regurgitation may result as a complication of a small ventricular septal defect in the membranous septum.
Your choice: Pulmonary hypertension
Pulmonary hypertension does not occur as a complication of a small ventricular septal defect. This complication can occur in the presence of a large defect that permits equalization of pressures in the right and left ventricles and, therefore, pulmonary arterial hypertension. Longstanding pulmonary hypertension predisposes the pulmonary vascular bed to obstructive pulmonary vascular disease due to muscular proliferation in the wall of the pulmonary arterioles. This pathologic change may become irreversible.