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': 'Levetiracetam is effective in: \nSelect and explain. \nA. Generalised tonic clonic seizure, B. Focal onset seizure, C. Absence seizure, D. Lennox-Gastaut syndrome', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Levetiracetam will be useful in focal onset seizure. Ref: Harrisons principles of internal medicine 18th edition ; Page : 3264, Table : 369/9.', 'role': 'assistant'}]