Gynaecology & Obstetrics Blood chimerism is most likely to occur in which of the following? A Monochorionic Monozygotic twins B Monochorionic Dizygotic twins C Dichorionic Dizygotic twins D Singleton pregnancy 💡 Explanation Blood chimerism is most likely to occur in which of the following? ✓ Correct Answer: B. Monochorionic Dizygotic twins