Which of the following oxide(s) gives brown ppt on reaction with conc. ${\mathrm{HNO}}_3$ ?

${\mathrm{PB}}_3{\mathrm{O}}_4$ gives brown ppt when react with conc. ${\mathrm{HNO}}_3$. The reaction is.

${\mathrm{Pb}}_3{\mathrm{O}}_4+4{\mathrm{HNO}}_3\to 2\mathrm{Pb}{({\mathrm{NO}}_3)}_2+{\mathrm{PbO}}_2+2{\mathrm{H}}_2\mathrm{O}$

Also, ${\mathrm{Pb}}_2{\mathrm{O}}_3$ gives brown ppt when react with conc. ${\mathrm{HNO}}_3$.

Thus, C and D are correct.