This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Immunology, Subject name: Microbiology
[{'content': 'Hapten is - \nSelect and explain. \nA. Same as epitope, B. Small molecular weight protein, C. Requires carrier for specific antibody production, D. Simple haptens are precipitate', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Haptens are small molecules that elicit an immune response only when attached to a large carrier such as a protein Reff: Ananthanarayan & Panikers textbook of microbiology 9th edition pg:87', 'role': 'assistant'}]