Bones glow in the dark because

Which statement is incorrect for nitric oxide $(NO)$?

The following are some statements related to $VA$ group hydrides:
$I$. Reducing property increases from $NH_3$ to $BiH_3$.
$II$. Tendency to donate lone pair decreases from $NH_3$ to $BiH_3$.
$III$. Thermal stability of hydrides decreases from $NH_3$ to $BiH_3$.
$IV$. Bond angle of hydrides decreases from $NH_3$ to $BiH_3$.
The correct statements are:

Which of the following has the highest number of $P-H$ bonds?

Choose the correct statement.

Which is the correct statement for the given acids?