This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardio thoracic surgery  , Subject name: Surgery
[{'content': 'All are true regarding mesothelioma except ? \nSelect and explain. \nA. Bilaterally symmetrical, B. Associated with asbestos exposure, C. Histopathalogy shows biphasic pattern, D. Occurs in late middle age', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Mesothelioma arises from mesothelial lining of serous cavities like pleural cavity & rarely in peritoneal cavity & pericardial sac.Pleural mesothelioma is either solitary(benign) or diffuse (malignant).Malignant mesothelioma is associated with asbestos exposure and occurs in late middle age.Histologically , it has got a biphasic pattern with whorls of collagen & reticulin with interspersed fibroblasts. Reference:Textbook of pathology-Harsh Mohan-6th edition,page no:505', 'role': 'assistant'}]