At which phase of its evolutionary life is a white dwarf?

Question

Quizplus · Accepted Answer

White dwarfs are the remnants of low-mass stars, which have exhausted their hydrogen fuel and undergone helium fusion in their cores. They eventually expel their outer layers and collapse into a dense, hot core. This marks the dying phase of the star's life, which is the phase in which a white dwarf exists. Option A refers to the central remnant of a supernova explosion, which can be either a neutron star or a black hole. Option B is incorrect as white dwarfs are not in their main-sequence phase. Option D is incorrect as white dwarfs are formed after the expulsion of their outer layers and are not in their early phases.

At Which Phase of Its Evolutionary Life Is a White