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: Medicine
[{'content': 'Cogwheel type of rigidity is seen in one of the following: \nSelect and explain. \nA. Parkinsonism, B. Multiple scelerosis, C. Motor neuron disease, D. Tabesdorsalis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]