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: Physiology
[{'content': 'True regarding vascularity of lung is: \nSelect and explain. \nA. Hypoxia causes vasodilation, B. Pulmonary resistance is half of the systemic vascular resistance, C. Perfusion is more in the apical lobe than in base, D. Distended pulmonary veins in the lower lobe', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. Distended pulmonary veins in the lower lobes', 'role': 'assistant'}]