In which class of mammals is a marsupium or brood pouch found?

Which of the following animals lays eggs but the female still secretes milk?

The egg found in monotremata is

Animals which show viviparity include

Note the following:
$I.$ Dentition is heterodont.
$II.$ Canines are poorly developed.
$III.$ Incisors are chisel-like,poorly developed.
$IV.$ Herbivorous and diastema is present.
$V.$ The dental formula is $I \frac{2}{1}, C \frac{0}{0}, P m \frac{3}{2}, M \frac{3}{3}$.
Which of the above are true for $Oryctolagus$?

Which group of animals possesses a marsupium?