This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fungal infections, Subject name: Dental
Fungi with no sexual stage: 
Select and explain. 
A. Imperfect fungi, B. Phycomycetes, C. Basidiomycetes, D. Ascomycetes
A: Imperfect fungi
Answer: A: Imperfect fungi 
Explanation: Fungi imperfecti also called as Deuteromycetes or Hyphomycetes is a provisional group of fungi whose sexual stages have not been identified.