Can a property be sold with power of attorney?

Person A is the land owner of survey no 10/1. He is the agent (Power of Attorney with permission to sign & register sale deed on behalf of land owners of survey no 10/2) for the adjacent land with survey no 10/2. He made plots on both 10/1 & 10/2 survey nos together & sold it as a Nagar. It is an unapproved layout. He has the authority to sign all the plots from that layout as land owner for some plots & as a Power of attorney for some.When he sold a plot in survey no 10/2 to Person B in 2013, he registered the document as that plot is from his own land in survey no 10/1, instead of registering it as agent for 10/2. Person B done subdivision from proper survey no 10/2 for this plot & got patta in 2015 though the property document had wrong survey no 10/1.B sold this plot to Person C in 2020. Please let me know how Person C can rectify the seller A as agent & include principals name & rectify survey no for this plot in the parent document & survey no alone in his property document?