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In the following options the number of c...

In the following options the number of correct statement(s) about three dimentional hcp system is x , then x is :-
1. The number id atoms in hcp unit cell is 6
2. The volume of hcp unit cell is 24`sqrt2`r`overset(3)`
3. The empty space in hcp unit cell is 26%.
4. The base area of hcp unit cell is 6`sqrt3`r`overset(2)`.

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