\( \left[\mathrm{Mn}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+} \) में अयुग्मित इलेक्...

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\( \left[\mathrm{Mn}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+} \) में अयुग्मित इलेक्ट्रॉनों की संख्या है :
(A) 3
(B) 5
(C) 2
(D) 4
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