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If the unit cell of a material has cubic...

If the unit cell of a material has cubic close packed array of oxygen atoms with m fraction of octahedral holes occupied by aluminium ions and n fraction of tetrahedral holes occupied by magnesium ions, m and n respectively are

A

`1/2,1/8`

B

`1,1/4`

C

`1/2,1/2`

D

`1/4,1/8`

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