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: Pediatrics
The most common anomaly seen in the fetus of a mother taking lithium carbonate is – 
Select and explain. 
A. Cardiac deformities, B. Neural tube defect, C. Limb reduction, D. Genitourinary deformities
A: Cardiac deformities
Answer: A: Cardiac deformities 
Explanation: It causes Ebstein anomaly.