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A solid crystallinses as cubic close pac...

A solid crystallinses as cubic close packing of `O^(2-)` ions. `A^(x+)` ions occupy 25% of the tetrahedral voids and `B^(y+)` ions occupy 50% of the octahedral voids. The suitable values of x and y are:

A

x = 1, y=3

B

x =2, y=1

C

x=3, y=2

D

x-=1, y=2

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