Patent foramen ovate is due to?
Ans. is 'd' i.e., Failure of fusion of septum primum and septum secundumAfter bih, the foramanovale closes by fusion of septum primum with septum secundum.Failure of fusion of these two septa results in patent pramenovale.
Failure of closure of sinoatrial orifice
Failure of fusion of septum primum and endocardial cushion
Failure of fusion of septum primum and septum intermedium
Failure of fusion of septum primum and septum secundum