Correct option (d) Uphill transport
Explanation :
Uphill transport is a process in which diffusion of a component occurs from a less concentrated stream to a more concentrated permeable stream. Facilitated transport ls a form of passive transport in which materials are moved across the plasma membrane by a transport protein down their concentration gradient.
It requires integral membrane proteins and highly selective biological membranes to cross. Saturation occurs in facilitated, diffusion because not enough carriers may be available to handle all the free solute.molecule the rate of movement may reach a maximum.
Thus ,uphill transport does not pertain to faciliated transport.
