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
Most common position of appendix is 
Select and explain. 
A. Pre ilial, B. Post ilial, C. Pelvic, D. Retro caecal
D: Retro caecal
Answer: D: Retro caecal 
Explanation: 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