Answer:
Option B, Diffraction
Step-by-step explanation:
Diffraction is the physical phenomena of light by which it bends while passing through the edge of an object. The bending of light is dependent on the relative size of wavelength of light to the size of opening. If opening is larger than the wavelength of light, then the bending will be negligible but when the opening is significantly small as compared to the wavelength of light then the bending of light is high and can be seen by naked eye.
Thus, the correct answer is option B.