Answer: The correct answer is D) Dwarf, giants, supergiants.
Dwarf star is small in size with very low luminous intensity that is very less bright. Giant stars have relatively larger radii and more luminous intensity.
Super-giant stars are the brightest stars in the universe and they have maximum radii and maximum luminous intensity. Due to this, they possess maximum radiating area.
Thus, option D) is the correct order of increasing size in stars.