This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Physiology
[{'content': 'All are true about Left ventricular failure except \nSelect and explain. \nA. Pulmonary oligemia, B. Kerley B lines, C. Redistribution to apices, D. Cardiomegaly', 'role': 'user'}, {'content': "Answer: B \nExplanation: In chest radiography, the Westermark sign is a sign that represents a focus of oligemia (hypovolemia) (leading to collapse of vessel) seen distal to a pulmonary embolism (PE).In chest radiography, the Westermark sign is a sign that represents a focus of oligemia (hypovolemia) (leading to collapse of vessel) seen distal to a pulmonary embolism (PE). Ref ganong's review of medical physiology 25e p418", 'role': 'assistant'}]