The size of the species, Pb, Pb2+,Pb4+ decreases as :

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Pb4+>Pb2+>Pb

Pb>Pb2+>Pb4+

Pb>Pb4+>Pb2+

Pb4+>Pb>Pb2+

answer is B.

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Detailed Solution

Atomic/ionic radius ∝1 Magnitude of (+ ve ) charge . As effective nuclear charge increases, size decreases.Pb>Pb2+>Pb4+

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