List three examples of selectively permeable material or item

Examples of Selectively Permeable Membranes. Selectively permeable membranes can be found around a variety of cells and places. The most common example is the phospholipid bilayer cell membrane that surrounds every cell in our bodies. Another example of a selectively permeable membrane is the inner membranes of an egg.Nov 5, 2014

It is either a  proton or a neutron im almost positive. hope this .

The answer to the question is (a)