All neutron stars are pulsars, but not all pulsars are neutron stars. The statement is false . So, the correct option is (b).
Only neutron stars with electromagnetic beams that are directed toward the Earth are referred to as pulsars. We can observe periodic pulses emanating from pulsars using ground-based observatories or satellites. Pulsars are neutron stars that emit electromagnetic radiation along their magnetic poles. There could be a lot of these neutron stars whose electromagnetic radiation is completely oblique to the Earth.
The two components that give neutron stars their pulses—rapid rotation and a potent magnetic field—decrease over time, causing the pulses to progressively weaken and become less frequent. Even a young, brilliant neutron star may not be able to be distinguished from Earth as a pulsar. We only notice pulses if a pulsar star just so happens to be pointed in the proper direction.
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