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': 'Upper motor neuron lesion is characterized by: March 2013 \nSelect and explain. \nA. Weakness and Spasticity, B. Fasciculations, C. Rigidity, D. Localized muscle atrophy', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A i.e. Weakness and spasticity', 'role': 'assistant'}]