This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abdomen and pelvis, Subject name: Anatomy
[{'content': 'Most common position of appendix is \nSelect and explain. \nA. Pre ilial, B. Post ilial, C. Pelvic, D. Retro caecal', 'role': 'user'}, {'content': 'Answer: D \nExplanation: The tip of the appendix can have a variable position within the abdominal cavity : retro-caecal (65-70%) pelvic (25-30%) pre- or post-ileal (5%) Ref - BDC 6e vol2 pg269', 'role': 'assistant'}]