The reaction of ${\mathrm{SO}}_2$ with ${\mathrm{PCl}}_5$, yield two oxohalides $\mathrm{A}$ and $\mathrm{B}$. $\text{'}\mathrm{A}\text{'}$ can also be prepared industrially by the reaction of ${\mathrm{SO}}_3$ and ${\mathrm{SCl}}_2$. Which of the following about $\mathrm{A}$ and $\mathrm{B}$ is incorrect ?

How many of the following is correct order of specified property. 

How many of the following properties increase down the group for nitrogen family?
($a$) Atomic size
($b$) Acidic character of oxides
($c$) Boiling point of hydrides
($d$) Reducing power all hydrides
($e$) Extent of $\mathrm{p\pi }-\mathrm{p\pi }$ overlap.
($f$) Metallic character.
($g$) Basic character of hydrides

Given below are some properties. How many of these can hold good for Phosphorus?
($\mathrm{a}$) Metal
($\mathrm{b}$) Non-metal
($\mathrm{c}$) Metalloid
($\mathrm{d}$) Exhibits allotropy
($\mathrm{e}$) Catenation property
($\mathrm{f}$) Solid
($\mathrm{g}$) Good conductor of electricity
($\mathrm{h}$) Least dense among nitrogen family elements.