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: Pharmacology
Raju, a 10 year old boy is having difficulty in learning at school. He has short lapses of awareness with eyelid fluttering that occur every 5–10 minutes. EEG studies reveal brief 3 Hz spike and wave discharges appearing synchronously in all the leads. Which of the following drugs would be effective but has the disadvantage that it causes sedation and tolerance ? 
Select and explain. 
A. Diazepam, B. Ethosuximide, C. Clonazepam, D. Valproic acid
C: Clonazepam
Answer: C: Clonazepam 
Explanation: None