Sodium has body centred packing. Distance between two nearest atoms is 3.7 $\mathop A\limits^ \circ $. The lattice parameter is

Question

4.3 $\mathop A\limits^ \circ $

3.0 $\mathop A\limits^ \circ $

8.6 $\mathop A\limits^ \circ $

6.8 $\mathop A\limits^ \circ $

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