This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
In standing position, Venous return to hea from lower limbs is affected by all of the following except? 
Select and explain. 
A. Competant valves, B. Deep fascia, C. Aerial pressure, D. Contraction of calf muscles
C: Aerial pressure
Answer: C: Aerial pressure 
Explanation: Factors affecting venous return from lower limbs:a. Muscle contraction- Venous return from lower limb depends largely on muscular activity, especially contraction of the calf muscles, known as the 'calf pump'.b. Deep fascia c. Valves d. Negative intrathoracic pressure made more negative during inspiration.e.Aerial pulsation of the aeries accompanying veins.