a ∶ b = 3 ∶ 2, b ∶ c = 5 ∶ 7 మరియు d ∶ c = 3 ∶ 4. అయితే a ∶ b ∶ c ∶ d విలువ?  

1
17 ∶ 20 ∶ 28 ∶ 13
2
28 ∶ 20 ∶ 22 ∶ 21
3
30 ∶ 20 ∶ 28 ∶ 21
4
30 ∶ 25 ∶ 28 ∶ 27

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