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(B) For an ionic crystal of general formula $A^{+}B^{-}$ with a coordination number of $6$,the radius ratio lies in the range of $0.414$ to $0.732$,wh

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Between $0.73$ and $0.41$

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(B) For an ionic crystal of general formula $A^{+}B^{-}$ with a coordination number of $6$,the radius ratio lies in the range of $0.414$ to $0.732$,which corresponds to an octahedral geometry.Summary of radius ratio ranges:$1$. Radius ratio $> 0.732$: Cubic coordination $(CN = 8)$.$2$. Radius ratio $0.414 - 0.732$: Octahedral coordination $(CN = 6)$.$3$. Radius ratio $0.225 - 0.414$: Tetrahedral coordination $(CN = 4)$.$4$. Radius ratio $0.155 - 0.225$: Triangular planar coordination $(CN = 3)$.

For an ionic crystal $A^{+}B^{-}$ with coordination number $6$,the radius ratio will be

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