If 2A = 3B and 3A = 5C, then find A : B : C

If 2A = 3B and 3A = 5C, then find A : B : C
1). 9 : 10 : 15
2). 10 : 15 : 9
3). 15 : 10 : 9
4). 15 : 9 : 10

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