A) \[F{{e}^{3+}}\]
B) \[C{{r}^{3+}}\]
C) \[M{{n}^{3+}}\]
D) \[C{{o}^{3+}}\]
Correct Answer: B
Solution :
Ionic radii\[\propto \frac{1}{atomic\text{ }number},\] ionic radius decreases from left to right in a period.
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