This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pharmacotherapy In Psychiatry, Subject name: Psychiatry
Ebstein's anomaly may be a complication of which drug when used during first trimester of pregnancy: 
Select and explain. 
A. Sodium valproate, B. Lamotrigine, C. Lithium carbonate, D. Carbamazepine
C: Lithium carbonate
Answer: C: Lithium carbonate 
Explanation: Ans. C. Lithium carbonate* Teratogenic effect of Lithium:* cardiac defect - Ebstein anomaly* Apical displacement of septal posterior tricuspid valve (arterialization of right ventricle)