system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
M.C. site of Ca esophagus is ?
assistant
The correct answer is  Ans. is 'c' i.e., Lower 1/3rdDistribution of esophageal Ca (Harrison 17th/e p. 571)Upper 3rd - 10%Middle 3'd 35%Lower 3rd --> 55%