An ionic compound is expected to have body centered type cubic unit cell if \( r_{c} / r_{a} \) ...

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An ionic compound is expected to have body centered type cubic unit cell if \( r_{c} / r_{a} \) :
(a) is greater than \( 0.732 \)
(b) lies in the range of \( 0.414 \) to \( 0.732 \)
(c) lies in the range of \( 0.255 \) to \( 0.414 \)
(d) lies in the range of \( 0.155 \) to \( 0.225 \)
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