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: Unknown
[{'content': 'Increased pulmonary blood flow radiologically indicated by all except: \nSelect and explain. \nA. Descending pulmonary artery diameter > 16 mm, B. Kerley B lines, C. Diameter of 2 peripheral arteries > accompanying bronchus, D. Peripheral arteries more than 6 in outer 1/3rd', 'role': 'user'}, {'content': 'Answer: B \nExplanation: (Refer – M.Satpathy’s Clinical Diagnosis of Congenital Heart Disease, 1st edition, pg no: 38)\nFeatures of increased pulmonary blood flow\n\nBlood vessels become visible in the outer third of lung field (At least 6 vessels can be traced to theouter third). When hilar and intrapulmonary vessels are uniformly changed, it is very suggestive of shunt lesions.\nRatio of right descending pulmonary artery to trachea > 1\nRight descending pulmonary artery diameter> 14 mm suggests increased blood flow and >17 mm is very strongly suggestive\nProminent end-on vessels seen at hilum\nEnface vessels below 10th posterior rib\nProminent vessels seen below crest of diaphragm\nRatio of vessels to adjacent bronchus >2:1', 'role': 'assistant'}]