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
The incidence of carcinoma of the caecum in relation to colonic adenocarcinoma is - 
Select and explain. 
A. 2%, B. 4.50%, C. 20%, D. None
D: None
Answer: D: None 
Explanation: Ans. is 'None'