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: Medicine
[{'content': 'Systemic Millary TB spreads \nSelect and explain. \nA. Aery, B. Vein, C. Bronchus, D. Lymphatic', 'role': 'user'}, {'content': "Answer: A \nExplanation: . Ans. is 'a' i.e., Aery", 'role': 'assistant'}]