This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S, Subject name: Pharmacology
[{'content': 'QT prolongation is caused by: \nSelect and explain. \nA. Quinidine, B. Omeprazole, C. Lidocaine, D. Penicillin', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. a. QuinidineRef: Goodman Gilman 12th e/P. 821Drugs Causing QT prolongation:Antihistamines: Class la (Quinidine) and Class IIICisaprideAntipsychotics: Ziprasidone, sertindole, quetiapine, haloperidol, etc.Antidepressants: Tricyclic antidepressants like amitriptyline, SSRI like fluoxetineAntibiotics: Fluoroquinolones, erythromycinAntihistaminics: Astemizole, terfenadineAntifungals: KetoconazoleAntimalarials: Chloroquine, quinine, halofantrineAntivirals: Amantadine', 'role': 'assistant'}]