Which has the weakest gravity at its surface

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Which has the weakest gravity at its surface.
A) a G main sequence star.
B) an M main sequence star.
C) a B main sequence star.
D) a K giant star.
E) a white dwarf.

You see helium absorption in the spectrum of a star which appears red. The star is probably
A) a red giant star.
B) an M main sequence star.
C) an O star seen through interstellar dust.
D) a G star that has just left the main sequence.

Reference no: EM13339043

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