Hemodynamic changes after pedicular clamping of Portal structures

Q) 33 year old male is undergoing resection of right lobe of liver Which of the following hemodynamic  happens during pedicular clamping in liver transaction? 

a) Systemic vascular resistance decreases by 20%

b) Mean arterial pressure decreases

c) Cardiac index decreases by 10%

d) Preload to the heart increases