Which stars can be classified in spectral class A? Select all two correct answers.
(1 point)
Red supergiants with a temperature of 4,500 Κ.
White dwarfs with a luminosity around 10 ^ - 2
Blue giants with a temperature of 10,000 Κ.
Red giants with an absolute magnitude of 0.
Main sequence stars with a luminosity of 10 ^ 4
(1 point)
Blue giants with a temperature of 10,000 Κ.
Main sequence stars with a luminosity of 10 ^ 4