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
Pre-treatment evaluation for lithium therapy should include - 
Select and explain. 
A. Fasting blood sugar, B. Serum creatinine, C. Liver function tests, D. Platelet count
B: Serum creatinine
Answer: B: Serum creatinine 
Explanation: Ans. is 'b' i.e., Serum creatinine Pretreatment evaluation for Lithium therapy o Serum creatinine (or 24 hour urine creatinine) o Thyroid function (T3, T4, TSH) o ECG o Electrolytes o Complete blood count o Pregnancy test