<prompt> Which of the following combinations will show vasomotor reversal of DalePhentolamine followed by adrenalinePropanalol followed by adrenalinePhentolamine followed by nor adrenalinePropanalol followed by nor adrenaline  <response>: Adrenaline leads to increased BP by acting on α1 - receptors, and vasodilation by action on β2 receptors. If it is administered after Phentolamine α1 - blocker it can lead to only vasodilation, which is termed as Vasomotor reversal of Dale. 