This is a matching answer type question as classified in NCERT Exemplar
Correct option is (i)
In XeF6, the central Xe atom undergoes sp3d3 hybridisation and the molecular geometry is distorted octahedral with 1 lone pair and 6 bond pairs of electrons.
In XeO3, the central Xe atom undergoes sp3 hybridis
The inertness of ? subshell electrons towards bond formation is known as inert pair effect. This effect increases down the group thus, for Sn, oxidation state is more stable, whereas, for Pb, oxidation state is more stable, i.e., is reducing while is oxidising.