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
All are used in status epilepticus, except- 
Select and explain. 
A. Phenytoin, B. Carbamazepine, C. Diazepam, D. Phenobarbitone
B: Carbamazepine
Answer: B: Carbamazepine 
Explanation: None