This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S, Subject name: Pharmacology
A young male presents with reduced sleep, hyperactivity and elevated mood. He has a family history of mania. Which of the following drug should be used for long term treatment of this patient? 
Select and explain. 
A. Sodium valproate, B. Lithium carbonate, C. Carbamazepine, D. Barbiturates
B: Lithium carbonate
Answer: B: Lithium carbonate 
Explanation: (Ref: Katzung 14th ed. P 524)Drug of choice for mania is LithiumDOC for acute attack of manic episode: Atypical antipsychotics/BenzodiazepinesAgents that can be used in treatment of Mania: (Mn: Li ACT Val)#Lithium (DOC)#Atypical antipsychotics#Carbamazepine#Topiramate#Valproate