This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Other topics and Adverse effects, Subject name: Pharmacology
[{'content': 'Which teratogen causes deafness? \nSelect and explain. \nA. Isotretinoin, B. Chloroquine, C. Alcohol, D. Warfarin', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Teratogenic drugs which cause deafness-. Tetracycline, minocycline, erythromycin,lsotretinoin, alcohol, phenytoin, thalidomide ESSENTIALS of MEDICAL PHARMACOLOGY SEVENTH EDITION -K D TRIPATHI Page:854 <a href="', 'role': 'assistant'}]