<prompt> Which of the following is a vinodilatorHydralazineMinoxidilNitroprussideNifedipine  <response>: Ref-Katzung 10e p173-174 Hydralazine, minoxidil and nifedipinen are primary aeriolar dilators whereas nitroprusside is a mixed Aeriolar and Venous delator therefore best answer here seems to be nitroprusside 