यदि A ∶ B = \(\frac{1}{3}:\frac{1}{5}\), B ∶ C = \(\frac{1}{7}:\frac{1}{8}\) और C ∶ D = \(\frac{1}{10}:\frac{1}{21}\), तो A ∶ B ∶ C ∶ D क्या है?

1
40 ∶ 24 ∶ 21 ∶ 10
2
48 ∶ 23 ∶ 25 ∶ 8
3
8 ∶ 3 ∶ 7 ∶ 5
4
14 ∶ 24 ∶ 28 ∶ 10
5
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