Which of the following will be the final stage in our sun's life cycle?

the true answer is it'll become a black dwarf at the final stage. it eventually cools, turns into a black dwarf and goes dark. while it is still a white dwarf, the gases forming the outer layer of the star cool and drift away from the core in a formation known as a planetary nebula.

answer; /// i believe the correct answer is (thrombocytopenia); (a)