This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Impoant facts in Immunization, Newer Vaccines, Subject name: Social & Preventive Medicine
[{'content': 'The role of adjuvant in a DPT vaccine is :- \nSelect and explain. \nA. Decrease hypersensitivity, B. Decrease absorption of vaccine, C. Increase antigenicity, D. Increase the shelf life of a vaccine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Aluminum hydroxide / phosphate is used as Adjuvant/adsorbent in DPT vaccine ; Binds three components (D,P,T) together Increases immunogenicity / Antigenicity - Thiomersal is added to DPT vaccine as a preservative. - Magnesium chloride is added to OPV vaccine: Provides stability.', 'role': 'assistant'}]