Rhizopus reproduces asexually by fragmentation.

The correct option is B False
Rhizopus is a genus of saprophytic fungi on plants and specialized parasites on animals. They reproduce by either asexual or sexual reproduction. In asexual reproduction, spores are produced inside a spherical structure, the sporangium. These spores on dispersal and germination on a suitable substratum, give rise to new individuals. Hence Rhizopus reproduces by spore formation and not by fragmentation.
Thus, the correct answer is option B.