This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory system, Subject name: Anatomy
[{'content': 'Earliest lesion seen in asbestosis is: \nSelect and explain. \nA. Pleural plaques, B. Hilar lymphadenopathy, C. Adenoma lung, D. Mesothelioma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: It is the most common manifestation of asbestosis exposure composed of plaques of dense collagen containing calcium.they are usually asymptomatic and develop on anteroir and postereolateral pas of parietal pleura and over diaphragm.(ref Robbins 9/e p691)', 'role': 'assistant'}]