A. Reducing nature increases from $\mathrm{NH}_3$ to $\mathrm{BiH}_3$
B. Tendency to donate lone pair of electrons decreases from $\mathrm{NH}_3$ to $\mathrm{BiH}_3$
C. The stability of hydrides decreases from $\mathrm{NH}_3$ to $\mathrm{BiH}_3$
D. HEH bond angle decreases from $\mathrm{NH}_3$ to $\mathrm{SbH}_3(\mathrm{E}=$ Elements of group 15)
Choose the correct answer from the options given below :