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: Pathology
Most common extranodal site for non-hodkin's lymphoma is - 
Select and explain. 
A. Stomach, B. Brain, C. Intestines, D. Tonsils
A: Stomach
Answer: A: Stomach 
Explanation: None