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Iron exhibits bcc structure at room temp...

Iron exhibits `bcc` structure at room temperature. Above `9000^(@)C`, it transformers to `fcc` structure. The ratio of density of iron at room temperature to that at `900^(@)C` (assuming molar mass and atomic radius of iron remains constant with temperature) is

A

`(3sqrt(3))/(4sqrt(2))`

B

`(4sqrt(3))/(3sqrt(2))`

C

`sqrt3/sqrt2`

D

`1/2`

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The correct Answer is:
A
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