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
The antiepileptic drug effective in Lennox-Gastaut syndrome is: 
Select and explain. 
A. Lamotrigine, B. Gabapentin, C. Tiagabine, D. Primidone
A: Lamotrigine
Answer: A: Lamotrigine 
Explanation: Lamotrigine is the most effective drug among the given options. Ref: Harrisons principles of internal medicine, 18 th edition ; Page : 3263, Table : 369/9.