This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Gynaecology & Obstetrics
[{'content': 'MC cause of aboion in first trimester is, defect in: \nSelect and explain. \nA. Placenta, B. Uterus, C. Embryo, D. Ovarian', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. is c i.e. Embryo As explained earlier most common cause of aboion in first trimester are chromosomal abnormalities involving the zygote or embryo', 'role': 'assistant'}]