Statement I : PbI4 is stable compound.Statement II : Iodide stabilizes higher oxidation state.

PbI4 is unstable compound and can't exist in natureReason:  (1) Iodine is less Electronegative and hence Iodine can't activate (excite) the 's' electrons present in the valence shell i.e., Inert pair effect hence, only PbI2 is formed(2) Pb+4 is a strong oxidizing agent where as I- is a strong reducing agent and hence in between them there is no possibility of reaction.