This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S., Subject name: Medicine
[{'content': 'Commonest site of hypertensive bleed in the brain is: \nSelect and explain. \nA. Putamen, B. Thalamus, C. Frontal lobe, D. Pons', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans: a', 'role': 'assistant'}]