Which of the following option is correct for ionic radii? (a) \( \mathrm{Ti}^{4+}\mathrm{Mn}^{7+...

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Which of the following option is correct for ionic radii?
(a) \( \mathrm{Ti}^{4+}\mathrm{Mn}^{7+} \)
(b) \( { }^{35} \mathrm{Cl}^{-}{ }^{37} \mathrm{Cl}^{-} \)
(c) \( \mathrm{K}^{+}\mathrm{Cl}^{-} \)
(d) \( \mathrm{P}^{3+}\mathrm{P}^{5+} \)
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