This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pharmacotherapy In Psychiatry, Subject name: Psychiatry
Which of the following drug is used for Lithium induced tremors? 
Select and explain. 
A. Add valproate, B. Propranolol, C. Trihexyphenidyl, D. Tetrabenazine
B: Propranolol
Answer: B: Propranolol 
Explanation: Ans. B. PropranololNeurological Effects of lithium1. Tremor: postural tremor (8to12Hz) (treatment- b-Adrenergic receptor antagonists, such as propranolol)2. Cognitive Effects (dysphoria, lack of spontaneity, slowed reaction times and impaired memory)3. Other Neurological Effects: symptoms of mild parkinsonism, ataxia, dysarthria, Peripheral neuropathy, benign intracranial hypertension (pseudotumor cerebri), findings resembling myasthenia gravis &increased risk of seizures.