أكتب الإجابة الصحيحة ؟ M.C.Q

In a healthy baby the transition from fetal to neonatal circulation involves:-

A.    Functional closure of the foramen ovale in the first 24 hours  
B.    Blood flow in the ductus arteriosus continues from right to left until its closure       
C.    Decrease in pulmonary artery resistance following closure of the ductus arteriosus      
D.    The ductus arteriosus closes in response to decreased oxygen concentrations     
E.    The umbilical artery is a branch of the common iliac artery