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
Venous return to hea during quiet standing is facilitated by all of the following factors, except 
Select and explain. 
A. Calfmuscle contraction during standing, B. Valves in perforators, C. Sleeve of deep fascia, D. Gravitational ihcrease in aerial pressure
D: Gravitational ihcrease in aerial pressure
Answer: D: Gravitational ihcrease in aerial pressure 
Explanation: During quiet standing gravity act against venous return to the heaGravity induces peripheral pooling of blood in leg instead.Calf muscle contraction pushes the blood towards heavalves prevents backflowRef: Medical Physiology Indu Khurana 2015 edition pAge No:220