Which of the following have isoelectronic structures? (i) \( \mathrm{CH}_{3}^{+} \) (ii) \( \mat...

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Which of the following have isoelectronic structures?
(i) \( \mathrm{CH}_{3}^{+} \)
(ii) \( \mathrm{H}_{3} \mathrm{O}^{+} \)
(iii) \( \mathrm{CH}_{3}^{-} \)
(iv) \( \mathrm{NH}_{3} \)
(A) (i) and (ii)
(B) (i) and (iii)
(C) (iii) and (iv)
(D) (ii), (iii) and (iv)
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