<prompt> Systemic vascular resistance is twice that of normal, treatment should be:AdrenalineNor-adrenalineSodium nitroprussideIsoprenaline  <response>: Ans. C Sodium nitroprussideRef: KDT 8the p613Increase in systemic vascular resistance means vasoconstriction, thus a vasodilator drug like nitroprusside should be used. Adrenaline and nor-adrenaline act as vasopressors whereas isoprenaline increases systolic blood pressure by acting on heart. 