<prompt> All are true regarding rectal carcinoma EXCEPT:Early morning spurious diarrhea and tenesmus can occurAdenocarcinoma is a rare variant of rectal carcinoma.Growth confined to the rectal mucosa is stage A of modified Dukes staging.Hamanns operation is done in old debilitated patients.  <response>: Rectal carcinoma: MC site of large bowel malignancy Adenocarcinoma is the most common variant of rectal carcinoma. CF- MC symptom- bleeding PR Early morning spurious diarrhea Tenesmus Weight loss IOC- rigid sigmoidoscopy biopsy Hamanns operation is done in old debilitated patients. 