Which characteristics best describe the star
betelgeuse?
(1) reddish orange with low luminosity and high
surface temperature
(2) reddish orange with high luminosity and low
surface temperature
(3) blue white with low luminosity and low surface
temperature
(4) blue white with high luminosity and high
surface temperature

The best answer is (2)

For a star, Betelgeuse has a rather low surface temperature (6000 F compared to the sun's 10,000 F). The low temperature means that the star will appear orange - red in color.

Betelgeuse is the brightest star in Orion and marks the western shoulder of the constellation. Betelgeuse is one of the largest known stars and is probably at least the size of the orbits of Mars or Jupiter around the sun. That's a diameter about 700 times the size of the sun or 600 million miles.