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The arrangement of X^(-) ions around A^(...

The arrangement of `X^(-)` ions around `A^(+)` ion in solid AX is given in the figure (not drawn to scale). If the radius of `X^(-)` is 250 pm, the radius of `A^(+)` is

A

104 pm

B

125 pm

C

183 pm

D

57 pm

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The correct Answer is:
A
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