What Is the Difference Between a Quasar and a Pulsar

What is the difference between a quasar and a pulsar?

A) The most distant objects detectable within the Universe are known as quasars and absorb enormous amounts of nebula. The reflection of energy from rotating neutron stars that arrive on Earth are known as pulsars.
B) The most distant objects detectable within the Universe are known as quasars and emit enormous amounts of radiation. The pulses of energy from rotating neutron stars that arrive on Earth with clockwork accuracy are known as pulsars.
C) A pulsar and quasar are the same object but named by different researchers.
D) The most distant objects detectable within the Universe are known as pulsars and emit enormous amounts of radiation. The pulses of energy from rotating neutron stars that arrive on Earth with clockwork accuracy are known as quasars.