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8 March, 03:05

Which variable stars have pulsation periods between 1.5 hours and 1.2 days?

A. Cepheid variables

B. Protostars

C. RR Lyrae variables

D. Nebulas

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  1. 8 March, 05:07
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    D. Nebulas is a cloud of dust,

    B. Protostars & A. Cepheid variables have longer pulsation periods.

    Whereas, C. RR Lyrae variables have pulsation periods between 1.5 hours and 1.2 days. So the answer is C.
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