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: Pathology
[{'content': 'All are the histological features of Pulmonary hypertension -a) Capillaritis of alveolar septab) Saddle thrombi in pulmonary trunkc) Thrombi in pulmonary vasculature d) Vaso-occlusive diseasee) Arterial wall thicken \nSelect and explain. \nA. cde, B. acd, C. bde, D. ade', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Pulmonary Hypertension \n\nIn pulmonary hypertension pathological changes are seen from main pulmonary arteries to arterioles. They are :\n(a) Arterioles and small pulmonary arteries :\n\t(i) Medial hypertrophy\n\t(ii) Thickening and reduplication of elastic lamina.\n\t(iii) Plexiform pulmonary arteriopathy in which intraluminal tuft of capillary formation occurs in dilated thin walled arteriolar branches.\n\n(b) Medium sized Pulmonary arteries :\n\t(i)\xa0Medial hypertrophy; which is not marked in secondary pulmonary hypertension.\n\t(ii)\xa0Concentric intimal thickening\n\t(iii)\xa0Adventitial fibrosis\n\t(iv)Thickening and reduplication of elastic laminae.\n\n(c) Large Pulmonary arteries :\nAtheromatous deposits\nVasoocclusive disease itself may lead to pulmonary hypertension.', 'role': 'assistant'}]