Math

Which ratios can form a proportion?
A. 20\25 , 14\21
B. 10\23 , 18\7
C. 5\45 , 4\36
D. 5\4 , 4\5

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  1. Oops I forgot to put my answer lol
    I think its c?

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  2. Somebody please help

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  3. C is correct

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