Which of the following statement(s) is/are correct regarding the halides of group 15  elements?

Trihalides except  $Bi{F}_3$  are predominantly covalent in nature.

$POC{l}_3$  is obtained as one of the intermediate product during the hydrolysis of  $PC{l}_5$

$PC{l}_3$  hydrolyses in the presence of moisture giving fumes of HCl

Solid  $PC{l}_5$  exists as ${\left[PC{l}_4\right]}^{+}{\left[PC{l}_6\right]}^{-}$