Which of the following compounds, when treated with $\mathrm{KI}$, does not release iodine?

Which of the following is a correct match?

a. ${\mathrm{H}}_2\mathrm{O}>{\mathrm{H}}_2\mathrm{S}>{\mathrm{H}}_2\mathrm{Se}>{\mathrm{H}}_2\mathrm{Te}:$ Thermal stability

b. $\mathrm{He}<\mathrm{Ne}<\mathrm{Ar}<\mathrm{Kr}<\mathrm{Xe}:$ Ease of liquefaction

c. $\mathrm{HF} >\mathrm{HI} >\mathrm{HBr} >\mathrm{HCl}:$ Order of boiling point

d. ${\mathrm{H}}_2\mathrm{O}<{\mathrm{H}}_2\mathrm{S}<{\mathrm{H}}_2\mathrm{Se}<{\mathrm{H}}_2\mathrm{Te}:$ Reducing character

The incorrect order of acidic strength is

Note:- Third option needs to update for the correctness of the question.

Which of the following group $14$elements can decompose steam to form dioxide and liberate ${\mathrm{H}}_2$?