This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Surgery
[{'content': 'What is most common type of carcinoma of the right colon \nSelect and explain. \nA. Stenosing, B. Ulcerative, C. Tubular, D. Fungating', 'role': 'user'}, {'content': 'Answer: B \nExplanation: .Annular (stenosing) type: >>* It is more common on left side. * Here the growth spreads round the internal wall and so it often presents with intestinal obstruction. Ulcerative type: >>* It is common on right side. Proliferative type: >> * Common in right side. It is fleshy, bulky and polypoid. It is less malignant. ref:SRB&;s manual of surgery,ed 3,pg no 835', 'role': 'assistant'}]