This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
In which case Anterior resection is the method of t/t - 
Select and explain. 
A. Ca sigmoid colon, B. Ca rectum, C. Ca colon, D. Ca anal canal
B: Ca rectum
Answer: B: Ca rectum 
Explanation: Anterior resection is the general term used to describe operations in which rectosigmoid part is resected from an abdominal approach with no need for perineal, sacral or other incision.
Resection of the rectosigmoid colon performed above the pelvic peritoneum is called high anterior resection, whereas an operation in which it is necessary to open the pelvic peritoneum to approach the lesion in upper 2/3 of rectum is called as Low anterior resection.