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: Physiology
Fick's law, flux of Geomembrane increased in: 
Select and explain. 
A. Concentration across, B. Temperature, C. Increased size of molecule, D. Weight
A: Concentration across
Answer: A: Concentration across 
Explanation: A i.e. Concentration acrossAccording to Fick's law of diffusion, the net rate of diffusion is directly propoional to available surface area across which diffusion is taking place and the concentration or chemical gradient but inversely propoional to thickness of membraneQ.Fick's Law of DiffusionThe magnitude of diffusing tendency is directly propoionate to the cross sectional area across which diffusion is taking place and the concentration gradient or chemical gradient , which is the difference in concentration of the diffusing substance divided by the thickness of boundary.