This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Haematology, Subject name: Pathology
[{'content': 'The most common extranodal site for non-hodgkin lymphoma is \nSelect and explain. \nA. Stomach, B. Brain, C. Intestine, D. Tonsils', 'role': 'user'}, {'content': 'Answer: A \nExplanation: *Lymphomas are divided broadly into Hodgkins and Non-Hodgkin&;s lymphomas. *Two-thirds of Non-Hodgkin&;s lymphoma present as generalized lymphadenopathy(Nodal sites).*One third of the cases present at an extranodal site. *Extra nodal sites include the gastrointestinal tract, upper aerodigestive tract, salivary glands, eye, mediastinum, lung, pleura, hea, spleen, liver etc. *The most common extranodal site is gastrointestinal tract, in which stomach is involved most often.', 'role': 'assistant'}]