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: Pediatrics
Ebstein anomaly is due to maternal intake of: 
Select and explain. 
A. Lithium, B. Copper, C. Cobalt, D. Nickel
A: Lithium
Answer: A: Lithium 
Explanation: a. Lithium(Ref: Nelson's 20/e p 2211-2217, Ghai 8/e p 420-423)Maternal drugCongenital heart diseasePhenytoinVSD, ASD, coarctation of aorta, PDAValproateCoarctation of aorta, aortic stenosis, pulmonary atresia, VSDLithiumEbstein anomaly, Tricuspid atresiaAlcoholASD. VSD