This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Drugs, Subject name: Medicine
Flumazenil used in:(1640-CMDT-2007) (400-KDT 6th)) 
Select and explain. 
A. Benzodiazepine overdose, B. Lithium toxicity, C. Tricyclic anti depresants, D. Cyanide poisoning
A: Benzodiazepine overdose
Answer: A: Benzodiazepine overdose 
Explanation: (Benzodiazepine overdose) (2568-H 16th) (1389-CMDT-2009) (400-KDT 6th)FLUMAZENIL - may reverse benzodiazepine induced coma flumazenil should NOT be given if the patient has coingested atricyclic antidepressant, is a user of high dose benzo diazepines or has a seizure disorder - precipitale seizures.* Flumazenil is a GABA receptor antagonist