In Placenta Praevia, the Placenta covers the internal OS, when it is closed, but partially covers it, when fully dilated in _ _ _ _ _ Degree.

In Placenta Praevia, the Placenta covers the internal OS, when it is c

1.	In Placenta Praevia, the Placenta covers the internal OS, when it is closed, but partially covers it, when fully dilated in _ _ _ _ _ Degree.
A.	1st
B.	2nd
C.	3rd
D.	4th
Answer» D. 4th