This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Drugs in Pregnancy, Subject name: Gynaecology & Obstetrics
If mother received lithium treatment for bipolar disorder during pregnancy, the fetus is likely to show: 
Select and explain. 
A. Neural tube defects, B. Facial defects, C. Urogenital defects, D. Cardiac defect
D: Cardiac defect
Answer: D: Cardiac defect 
Explanation: Lithium is pregnancy category X drug. Lithium is known to cause various cardiac anomalies, especially Ebstein anomaly.