This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Physiology & Histology, Subject name: Gynaecology & Obstetrics
[{'content': 'Most common twin after assisted reproduction: \nSelect and explain. \nA. Monozygotic, B. Acardiac twin, C. Dizygotic twin, D. Conjoined twin', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. c. Dizygotic twinRef: Williams Obstetrics 24th Ed; Page No-274Dizygotic twins are most common.Identifiable risk factors include by race, geography, family history, or ovulation induction.Risk of twinning is up to 10% with clomiphene citrate and up to 30% with human menopausal gonadotropin.Monozygotic twins have no identifiable risk factors.MULTIPLE PREGANCY FLOW-CHART', 'role': 'assistant'}]