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
Levetiracetam is effective in: 
Select and explain. 
A. Generalised tonic clonic seizure, B. Focal onset seizure, C. Absence seizure, D. Lennox-Gastaut syndrome
B: Focal onset seizure
Answer: B: Focal onset seizure 
Explanation: Levetiracetam will be useful in focal onset seizure. Ref: Harrisons principles of internal medicine 18th edition ; Page : 3264, Table : 369/9.