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: Anatomy
[{'content': 'The prerequisites for internal rotation of the head all are except \nSelect and explain. \nA. Well flexed head, B. Efficient uterine contraction, C. Favourable shape of pelvis, D. Tone of abdominal muscles', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Tone of abdominal muscles doesnot correspond to internal rotation of head', 'role': 'assistant'}]