A ∶ B = 2 ∶ 3, B ∶ C = 4 ∶ 5, C ∶ D = 6 ∶ 7 হলে A ∶ D = ?

1
18 ∶ 15
2
16 ∶ 35
3
16 ∶ 15
4
18 ∶ 35

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