<prompt> In Dukes classification of colorectal carcinoma stageA meansInvolvement upto muscularis propriaInvolvement beyond muscularis propriaPositive lymph node involvementDistant metastasis  <response>: A Involvement up to muscularis propria Dukes prognostic classification A-growth in colonrectum only B-growth extending to extrarectal tissues but no metastasis to regional lymph nodes C-secondary deposits in regional lymph nodes 