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: Pharmacology
Most common congenital anomaly associated with lithium - 
Select and explain. 
A. Cardiac malformations, B. Neural tube defects, C. Renal anomaly, D. Fetal hydantoin syndrome
A: Cardiac malformations
Answer: A: Cardiac malformations 
Explanation: Ans. is 'a' i.e., Cardiac malformations Teratogenic effects of lithium o Lithium carries the risk of teratogenesis if ingested during pregnancy, especially during first trimester. o The most commonly repoed congenital malformations are cardiac abnormalities paicularly Ebstein's anomaly. o Other congenital malformations have also been described and include neural tube defect, Talipes, Microtia, thyroid abnormalities.