This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Heart, Circulation, and Blood, Subject name: Physiology
What is the reason for increased interstitial fluid? 
Select and explain. 
A. Increase hydrostatic pressure, increase oncotic pressure, B. Decrease hydrostatic pressure, decrease oncotic pressure, C. Increase hydrostatic pressure, decrease oncotic pressure, D. Decrease hydrostatic pressure, increase oncotic pressure
C: Increase hydrostatic pressure, decrease oncotic pressure
Answer: C: Increase hydrostatic pressure, decrease oncotic pressure 
Explanation: Ans. C Increase hydrostatic pressure, decrease oncotic pressure* Starling's hypothesis states that the fluid movement due to filtration across the wall of a capillary is dependent on the balance between the hydrostatic pressure gradient and the oncotic pressure gradient across the capillary.The four Starling's forces are:1. Hydrostatic pressure in the capillary (Pc)2. Hydrostatic pressure in the interstitium (Pi)3. Oncotic pressure in the capillary (pc)4. Oncotic pressure in the interstitium (pi)The balance of these forces allows calculation of the net driving pressure for filtration.Net Driving Pressure =