This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anesthesia, Subject name: Pharmacology
All are vasodilators except 
Select and explain. 
A. Procaine, B. Lidocaine, C. Cocaine, D. Chlorprocaine
C: Cocaine
Answer: C: Cocaine 
Explanation: Cocaine in the periphery blocks uptake of NA and adrenaline into adrenergic nerve endings,resulting in higher concentration of the transmitter around the receptors leading to sympathomimetic effect thats is vasoconstriction , tachycardia,rise in BP , mydriasis. From KD Tripati 7th edition Page no 365