Which of the following statements are correct about \( \mathrm{Zn}, \mathrm{Cd} \) and \( \mathr...

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Which of the following statements are correct about \( \mathrm{Zn}, \mathrm{Cd} \) and \( \mathrm{Hg} \) ?
(I) they exhibit high enthalpies of atomisation as the \( d \)-subshell is full
(II) \( \mathrm{Zn} \) and \( \mathrm{Cd} \) do not show variable oxidation states while \( \mathrm{Hg} \) shows \( +\mathrm{I} \) and \( +\mathrm{II} \)
\( P \)
(III) Compound of \( \mathrm{Zn}, \mathrm{Cd} \) and \( \mathrm{Hg} \) are paramagnetic in nature
W
(IV) \( \mathrm{Zn}, \mathrm{Cd} \) and \( \mathrm{Hg} \) are called soft metals
(a) I, II, III
(b) I, III
(c) II, IV
(d) IV only
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