In $XeO_3$ and $XeF_6$ the oxidation state of $Xe$ is

$XeF_6$ on complete hydrolysis gives:

Assertion $(A)$: Helium has the lowest boiling point $(4.2 \ K)$.
Reason $(R)$: The forces that exist between helium atoms are weak dispersion forces.

$XeF_6$ on partial hydrolysis gives '$X$' and $HF$. The shape of '$X$' is

Match List-$I$ with List-$II$

$A. \ XeO_3$	$I. \ sp^3 d, \text{linear}$
$B. \ XeF_2$	$II. \ sp^3, \text{pyramidal}$
$C. \ XeOF_4$	$III. \ sp^3 d^3, \text{distorted octahedral}$
$D. \ XeF_6$	$IV. \ sp^3 d^2, \text{square pyramidal}$

Choose the correct answer from the options given below:

Which is the last element of the noble gas group?