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In a f.c.c. arrangement of A and B atoms...

In a `f.c.c.` arrangement of `A` and `B` atoms, where `A` atoms are at the corners of the unit cell and `B` atoms at the face `-` centres, one of the `A` atom is missing from one corner in each unit cell. The formula of compound is `:`

A

`A_(7) B_(3)`

B

`AB_(3)`

C

`A_(7) B_(24)`

D

`A_(7//8) B_(5)`

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