This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General obstetrics, Subject name: Gynaecology & Obstetrics
[{'content': 'Which of the following is not same in monozygotic twins \nSelect and explain. \nA. Sex, B. Finger prints, C. Blood group, D. Histocompatibilty', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Monozygotic twin features: Same sex Same genetic features Acceptance of reciprocal skin graft Similar physical and behavioral features . Ref : Dutta Obs 9e pg 190.', 'role': 'assistant'}]