An archegonium of $Riccia$ has:

• A
  $4$ neck canal cells,$1$ venter canal cell,and one oosphere
• B
  $4$ neck canal cells,$2$ venter canal cells,and one oosphere
• C
  $4$ neck canal cells,one venter canal cell,and two oospheres
• D
  $6$ neck canal cells,$2$ venter canal cells,and one oosphere