This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Dental
Hapten is? 
Select and explain. 
A. Antigenic and proteinaceous substance, B. Protein and non antigenic, C. Nonprotein and antigenic, D. Nonprotein and non antigenic
A: Antigenic and proteinaceous substance
Answer: A: Antigenic and proteinaceous substance 
Explanation: None