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# Self reduction is possible in which of following :

$\begin{array}{1 1}(a)\;FeO\\(b)\;SnO\\(c)\;Ag_2O\\(d)\;PbO\end{array}$

Standard reduction potential (SRP) of metal increases stability of metal oxide decreases because of above reaction.
Since SRP of $PbO > FeO / SnO /Ag_2O$
So its decomposition is easily possible .So its self reduction is easily possible.
Hence (d) is the correct answer.