Gynaecology & Obstetrics General obstetrics f2172cee True about Dizygotic twins A Always same sex B Always different sex C Separate chorion and amnion D Blood group is always different High-Yield Explanation Dizygotic twins : There are two placentae, either completely separated or more commonly fused Fetus surrounded by a separate amnion and chorion Ref: Dutta Obs 9e pg 189.