<prompt> Most common position of appendix is ?PreilialPost ilialPelvicRetrocaecal  <response>: Ans. is d i.e., RetrocaecalVermiform Appendix It is a narrow worm-like tubular diveiculum which arises from the postero-medial wall of the caecum about 2 cm below ileocaecal function and is suspended by a peritoneal fold known as mesoappendix or appendicular mesentery.Length of appendix is 2-20 cm average 9 cm.The appendix lies in the right iliac fossa.Base of the appendix is fixed, but the tip can point in any direction, according to which positions of appendix are classified :-Retrocaecal 12 0 clock positon : It is the commonest position in 65 of individuals.Pelvic 4 0 clock position : It is second commonest position in 30 of individuals.Paracolic 11 0 clock position : In 20 of subjects.Midinguinal 6 0 clock position : In 2 of subjects.Pre and post-ileal 3 0 clock position : In 1 and 0.4 subjects, respectively.Promontoric 3 0 clock position : In 1 of subjects.Appendix develops from midgut and therefore is supplied by superior mesenteric aery through appendicularbranch of ileocolic aery. 