This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: AIIMS 2018, Subject name: Pharmacology
Use of lithium during pregnancy increases the risk of development of which of the following malformations in the baby? 
Select and explain. 
A. Facial defects, B. Cardiac defects, C. Neural tube defects, D. Urogenital defects
B: Cardiac defects
Answer: B: Cardiac defects 
Explanation: Lithium causes Ebstein's anomaly (malformation in tricuspid valve of hea) if given in pregnancy. Other side effects of lithium includes: Leucocytosis I Tremors (most common adverse effect) Hypothyroidism Increase Urine (polyuria) Mothers (avoided in pregnancy).