Identify the correct orders from the following with respect to the property associated with

A. $\mathrm{NH}_3>\mathrm{PH}_3>\mathrm{AsH}_3>\mathrm{SbH}_3-$ Bond angle

B. $\mathrm{NH}_3>\mathrm{PH}_3>\mathrm{AsH}_3>\mathrm{SbH}_3-$ Basic character

C. $\mathrm{PH}_3>\mathrm{AsH}_3>\mathrm{SbH}_3>\mathrm{NH}_3-$ Thermal stability

D. $\mathrm{SbH}_3>\mathrm{NH}_3>\mathrm{AsH}_3>\mathrm{PH}_3-$ Boiling point

The dioxides and monoxides of elements $X$ and $Y$ are amphoteric in nature. $X$ and $Y$ are respectively

Assertion (A) : In group 15 elements nitrogen does not form pentahalides.

Reason (R) : Nitrogen can exhibit +5 oxidation state.

The correct option among the following is

Which of the following reaction represents Deacon's method?