After removing the hard shell of an egg by dissolving it in dil. $\mathrm{HCl}$, a semipermeable membrane is visible. If such an egg is kept in  a saturated solution of common salt the size  of the egg 

In osmosis, solvent moves from low concentration solute to high concentration solute. Since salt is high in solution outside egg the water the egg will shrink.

Therefore, option A is the correct answer.