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: Radiology
[{'content': "Radiologically, increased pulmonary blood flow is indicated by the following except: \nSelect and explain. \nA. Descending pulmonary aery diameter> 16 mm, B. Kerley b lines, C. Diameter of peripheral aeries > 2 accompanying bronchiole, D. > 6 blood vessel in outer 1/3''", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. Kerley b lines', 'role': 'assistant'}]