Which of the following statements is NOT correct?

Select one:

a. The balancing force acting against the inward gravitational pull in a neutron star arises from the Pauli Exclusion force between neutrons.

b. Pulsars are rotating white dwarves that emit strong electric field.

c. When the fusion cycle inside a star reaches iron, the fusion cannot continue any longer.

d. Planetary nebulae are layers of ionized gas drifting away from the core of a formerly red giant.

e. Pauli's Exclusion Principle states that no two fermions can occupy the same place.