The $C-C$ bond length is maximum in

Consider the following statements:
Statement-$I$: $CCl_4$ does not undergo hydrolysis,but $SiCl_4$ undergoes hydrolysis.
Statement-$II$: Thermal and chemical stability of $GeX_4$ is more than $GeX_2$.
The correct answer is:

Which of the following is used for making optical instruments?

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

List-$I$	List-$II$
$A$. Coke	$I$. Carbon atoms are $sp^3$ hybridised
$B$. Diamond	$II$. Used as a dry lubricant
$C$. Fullerene	$III$. Used as a reducing agent
$D$. Graphite	$IV$. Cage like molecules

Choose the correct answer from the options given below:

Identify the incorrect statement.

Identify the correct statement$(s)$ from the following: $I$. The catenation property of group $14$ elements decreases from carbon to tin. $II$. Fullerene $(C_{60})$ has $20$ five-membered carbon rings and $12$ six-membered carbon rings. $III$. $SiO_2$ is soluble in conc. $NaOH$.