This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular system, Subject name: Physiology
[{'content': 'Which of the following causes decrease in BP? \nSelect and explain. \nA. Thromboxane A2, B. Vasopressin, C. NO, D. PGF2', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Determinants of BP are:Cardiac outputBlood volume Peripheral resistance Viscosity of blood Elasticity of vessel wall Peripheral resistance depends on the calibre of small aeries. So the state of constriction or dilation of these vessels determines the diastolic BP to a large extent.NO is a vasodilator and decreases BP. Vasopressin, Thromboxane A2 are vasoconstrictors and increases BP.Ref: Textbook of medical physiology by N Geetha, 2nd edition, page no. 177-182', 'role': 'assistant'}]