This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Stomach & Duodenum, Subject name: Surgery
Which of the following is a curative resection? 
Select and explain. 
A. R0, B. R1, C. R2, D. R3
A: R0
Answer: A: R0 
Explanation: Ans. (a) R0Ref: Sabiston 20th Edition, Page 1218* R 0,1,2 are used to show the completeness after resection of a cancer* R0--Microscopic margin is negative in specimen* R1--Microscopic margin is positive in specimen* R2--Macroscopic margin is positive in specimen