Which of the following statements regarding the H-R diagrams of star clusters is NOT correct?
A. A very young cluster will have stars that lie in the right-hand side and a little above the main sequence.
B. A very young cluster will not show a turn-off point.
C. A very old cluster will have many stars in the upper left corner of the H-R diagram.
D. A very old cluster will show a turn-off point and will have many red and yellow giant stars.
E. A very young cluster will not have all its stars on the main sequence.
Answer: C
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Fill in the blank(s) with correct word
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