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 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
Ans. a
(18)