This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Central Nervous system, Subject name: Pharmacology
A patient on lithium therapy was found to be hypeensive also. Which of the following antihypeensive drugs is contraindicated in a patient on lithium therapy in order to prevent toxicity? 
Select and explain. 
A. Clonidine, B. Beta blockers, C. Calcium channel blockers, D. Diuretics
D: Diuretics
Answer: D: Diuretics 
Explanation: Diuretics (thiazide, furosemide) by causing Na+ loss promote proximal tubular reabsorption of Na+ as well as Li+ --plasma levels of lithium rise. ref : KD Tripati 8th ed.