This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Central Nervous system, Subject name: Pharmacology
The drug used in petit mal seizures and has a narrow spectrum of antiepileptic activity is 
Select and explain. 
A. Lamotrigine, B. Ethosuximide, C. Phenytoin, D. Primidone
B: Ethosuximide
Answer: B: Ethosuximide 
Explanation: Ethosuximide and valproate are the drugs of choice for absence seizures and are more effective than lamotrigineReference: Katzung Pharmacology; 12th edition; Page no: 418