This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S, Subject name: Pharmacology
[{'content': 'A woman treated with lithium during pregnancy, the fetus should be tested for: \nSelect and explain. \nA. Neural tube defects, B. Cardiac malformations, C. Urogenital abnormalities, D. Scalp defects', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. (B) Cardiac malformations.(Ref: Katzung, 11/e p500; Goodman and Gilman, 11/e p1326; KDT 8/e p 476-477)Lithium, if taken during pregnancy, can cause Ebstein's anomaly in the fetus, which is a congenital heart disease presenting as tricuspid atresia.", 'role': 'assistant'}]