This illustration BEST represents the light A)
from the sky as the sun sets and the sky darkens and reddens.
B)
from the sky as the sun rises and the sky goes from black to light blue.
O
on a porch as porch lights are turned off leaving only the dim violet insect
light on
in a laboratory as all room lights are switched off and an intense
ultraviolet lamp is left on.
D

The  grandmother cell  is a hypothetical  neuronthat represents a complex but specific concept or object.[1]  it activates when a person "sees, hears, or otherwise sensibly discriminates"[2]  a specific entity, such as his or her grandmother. the term was in use at least as early as 1966 amongst staff and students in the department of experimental psychology, university of cambridge, england. a similar concept, that of the  gnostic neuron, was proposed two years later