Ascientist observes two stars in the night sky through a telescope. star a is white in color and relatively dim. the star’s estimated temperature is very high.
star b is red in color and extremely bright. the star’s temperature is low compared with other stars.

the scientist classify the two stars.
star a is ( a. black dwarf b. white dwarf c. neutron star d. red super-giant)
star b is ( a. black hole b. red dwarf c. red giant d. supernova)