<prompt> What is most commonly involved in carcinoma colon -CaecumRectosigtmoid colonTransverse colonAscending colon  <response>: Ans. is b i.e., None Rectosigmoid colonColon cancer o Viually 98 of all concers in the large intesting are adenocarcinoms.o Peak age of presentation is 60-80 years.Overall, adenocarcinoma are distributed approximately equally over the entire length of colon Robbins 8the p 824 Note: according to 7the of Robbins answer was recotosigmoid. Information given in 7the of Robbins were: o The most common site is rectosigmoido The distribution is as follows:?Rectosigmoid colon -- 55 Transverse colon -- 11Cecum ascending colon -- 22 Discending colon -- 6other sites 