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A compound made of two elements A and B ...

A compound made of two elements A and B is found to contains 25% A (atomic mass 12.5) and 75% B (atomic mass 37.5). The simplest formula of the the compound is :-

A

AB

B

`AB_2`

C

`AB_3`

D

`A_3B`

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The correct Answer is:
A
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