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': "A characteristic pathological feature of Parkinson's disease is presence of - \nSelect and explain. \nA. Lewy bodies, B. Babes nodule, C. Neuro fibrillary tangle, D. Negri-bodies", 'role': 'user'}, {'content': "Answer: A \nExplanation: Pathologic Examination in Parkinson shows :\n\nGross / Macroscopically: Pallor of the substantia nigra and locus coeruleus\nMicroscopic Examination :\xa0\xa0\xa0\xa0\n\n1. Loss of catecholaminergic neurons in these regions + gliosis\n2. Lewy bodies.\n\nLewy bodies: are inclusion bodies found within neurons in Parkinson's disease.\nLewy bodies are single or multiple, intra-cytoplasmic, eosinophilic, round and elongated inclusions that often have a dense core surrounded by a pale halo.\nUltrastructurally: These are composed of fine filaments, densely packed in the core but loose at the rim.", 'role': 'assistant'}]