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 commonest pancreatic tumour is - 
Select and explain. 
A. Ductal adenocarcinoma, B. Cystadenoma, C. In sulinoma, D. Non islet cell tumour
A: Ductal adenocarcinoma
Answer: A: Ductal adenocarcinoma 
Explanation: Ans. is 'a' i.e., Ductal adenocarcinoma Grainger writes - "Tumors both benign and malignant, may arise in the exocrine or endocrine tissue of the pancreas. The commonest of these is ductal adenocarcinoma."