<prompt> Vasoconstrictor anong these ?NOPGI2Angiotensin-IIANP  <response>: Ans. is c i.e., Angiotensin-IIImpoant chemical regulator of CVS are :Vasoconstrictors : Noradrenaline, Adrenaline, ADH vasopressin, angiotension II, Endothelins, PGF2, thromboxane A2.Vasodilators : Kinins Bradykinin, lysyl-bradykinin, PGE,, PGL prostacyclin, VIP, ANP, Nitric oxide NO 