Consider the following reactions.

$\underset{\text { (Hot solution) }}{\mathrm{PbCl}_2}+\mathrm{K}_2 \mathrm{CrO}_4 \rightarrow A+2 \mathrm{KCl}$

$$ \begin{aligned} & \mathrm{A}+\mathrm{NaOH} \rightleftharpoons \mathrm{~B}+\mathrm{Na}_2 \mathrm{CrO}_4 \\ & \mathrm{PbSO}_4+4 \mathrm{CH}_3 \mathrm{COONH}_4 \rightarrow\left(\mathrm{NH}_4\right)_2 \mathrm{SO}_4+\mathrm{X} \end{aligned} $$

In the above reactions, $\mathrm{A}, \mathrm{B}$ and X are respectively.

Given below are two statements :

Statement I : The number of pairs among $\left[\mathrm{SiO}_2, \mathrm{CO}_2\right],\left[\mathrm{SnO}, \mathrm{SnO}_2\right],\left[\mathrm{PbO}, \mathrm{PbO}_2\right]$ and $\left[\mathrm{GeO}, \mathrm{GeO}_2\right]$, which contain oxides that are both amphoteric is 2 .

Statement II : $\mathrm{BF}_3$ is an electron deficient molecule, can act as a Lewis acid, forms adduct with $\mathrm{NH}_3$ and has a trigonal planar geometry.

In the light of the above statements, choose the correct answer from the options given below :

The correct statements from the following are :

(A) Tl³⁺ is a powerful oxidising agent

(B) Al³⁺ does not get reduced easily

(C) Both Al³⁺ and Tl³⁺ are very stable in solution

(D) Tl¹⁺ is more stable than Tl³⁺

(E) Al³⁺ and Tl¹⁺ are highly stable

Choose the correct answer from the options given below :

Given below are two statements :

Statement (I) : The first ionisation enthalpy of group 14 elements is higher than the corresponding elements of group 13.

Statement (II) : Melting points and boiling points of group 13 elements are in general much higher than those of corresponding elements of group 14.

In the light of the above statements, choose the most appropriate answer from the options given below :