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In a face centered cubic lattice, atom (...

In a face centered cubic lattice, atom (A) occupies the corner positions and atom (B) occupies the face centre positions. If one atom of (B) is missing from one of the face centered points, the formula of the compound is :

A

`A_2 B_5`

B

`A_2 B_3`

C

`AB_2`

D

`A_2 B`

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