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': 'Manual appreciation of fetal pas and fetal movement by examination is earliest possible at____________weeks of gestation: \nSelect and explain. \nA. 20, B. 24, C. 26, D. 28', 'role': 'user'}, {'content': 'Answer: A \nExplanation: 20', 'role': 'assistant'}]