The correct option is A Uninucleate gametangia
The common black, bread moulds Rhizopus and Mucor belong to Zygomycotina. Asexual spores are non-motile. Sexual reproduction takes place by the complete fusion of two multi-nucleate gametangia, producing a zygospore. Because of this, the fungi of the class Zygomycetes are also known as conjugation fungi.