which of the following is /are correct?

1.	which of the following is /are correct?
Answer» In (HCP) unit cell, the total number of octahedral voids is 4. The third nearest neighbour of `Na^(+)` in `NaCl` is `8Cl^(-)` ions . The rank of ZNS unit cell is four (4). The (hcp)unit cell the total number of TETRAHEDRAL void is 12. Answer :B::C::D

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