The parthenospores of  are
a)	Uninucleate	b)	Binucleate	c)	Trinucleate	d)	Multinucleate

(d)

In , sexual reproduction takes place by the fusion of two multinucleate gametangia. Occasionally, fusion does not take place between gametangia and these gametangia are surrounded by a many layered wall and then develop into multinucleate azygospores (parthenospore).