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: Pathology
Following are the various causes of edema except: 
Select and explain. 
A. Increase in hydrostatic pressure, B. Decreased colloid osmotic pressure, C. Due to lymphatic obstruction, D. Decrease in intravascular pressure
D: Decrease in intravascular pressure
Answer: D: Decrease in intravascular pressure 
Explanation: Approximately 60% of lean body weight is water, two-thirds of which is intracellular. Most of the  remaining water is found in extracellular compartments in the form of interstitial fluid; only 5% of the body’s water is in blood plasma.  As noted earlier, edema is an accumulation of interstitial fluid within tissues. 

Increases in hydrostatic pressure are mainly caused by disorders that impair venous return. Local increases in intravascular pressure caused, for example, by deep venous thrombosis in the lower extremity can cause edema restricted to the distal portion of the affected leg.
Reduction of plasma albumin concentrations leads to decreased colloid osmotic pressure of the blood and loss of fluid from the circulation.
Edema may result from lymphatic obstruction that compromises resorption of fluid from interstitial spaces.

Robbins BASIC  PATHOLOGY T E N T H   E D I T I O N page no.99