\( \mathrm{C}^{4+} \) does not exist but \( \mathrm{Pb}^{4+} \) exists although both belong to t...

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\( \mathrm{C}^{4+} \) does not exist but \( \mathrm{Pb}^{4+} \) exists although both belong to the same group. The reason behind this is:
1. Size of \( \mathrm{C} \) is much smaller than \( \mathrm{Pb} \).
2. Large amount of energy is required in case of carbon.
3. Inert pair effect.
4. None of these
Select the correct statement(s)
a. Only 2
b. 1 and 2
c. Only 3
d. 1, 3 and 4
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