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: Microbiology
False about Haptens is 
Select and explain. 
A. Haptens are high molecular weight molecules, B. Lack immunogenicity, C. Retain antigenicity, D. Complex haptens contain two or more epitopes
A: Haptens are high molecular weight molecules
Answer: A: Haptens are high molecular weight molecules 
Explanation: Haptens are low molecular weight molecules.