Which of the following best describes the process of a type-1 supernova?

The process of a type-I supernova is characterized primarily by the explosive nuclear fusion triggered by the accumulation of gas from a companion star onto a white dwarf. In this scenario, the white dwarf, which is the remnant core of a star that has exhausted its nuclear fuel, can draw material from a nearby companion star. As this gas accumulates, it raises the mass of the white dwarf. When the mass approaches a critical limit known as the Chandrasekhar limit (approximately 1.4 times the mass of the Sun), the conditions become right for runaway nuclear fusion reactions to occur.

This rapid increase in temperature and pressure in the core leads to an explosive fusion of carbon and oxygen, resulting in an enormous release of energy and ultimately causing the star to explode in a type-I supernova. This type of supernova is significant because it occurs without the presence of hydrogen lines in its spectrum, which helps in its classification.

In contrast, a type-I supernova does not involve a rapid implosion of a massive stellar core or a solitary star exploding after reaching its limit; these scenarios pertain to type-II supernovae, where massive stars undergo core collapse. Additionally, quasars, which emit immense radiation, are not directly related to the