This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Gynaecology & Obstetrics
[{'content': 'Fetal hea stas contracting at- \nSelect and explain. \nA. 10-12 days, B. 10-12 weeks, C. 3-5 weeks D. 3- 5 month, D. 3- 5 month', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The fetal hea stas contracting at approximately 23 days of gestation REF : DUTTA BOOK OF OBESTETRICS', 'role': 'assistant'}]