21. an electron is excited to a higher energy level with 5.3 units of energy. when it relaxes to the ground
state, the emitted photon will have which of the following energies?
a. greater than 5.3 units
b. 5.3 units
c. less than 5.3 units
d. some integer multiplied by 5.3 units

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

What are the choices?