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
[{'content': 'All of the following statements about adverse effects of tetracyclines are true, except: \nSelect and explain. \nA. May lead to discolouration of teeth, B. Are a common cause of superinfections, C. May precipitate Liver damage, D. Are not known to be teratogenic', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Tetracyclines are known to have teratogenic effects. Consumption of Tetracycline during pregnancy may cause dental enamel dysplasia and bony deformities in the child. Ref: KDT, 6th Edition, Page 714; Basic and Clinical Pharmacology By Katzung, 10th Edition, Page 748', 'role': 'assistant'}]