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': 'C-reactive protein is - \nSelect and explain. \nA. An antibody produced as a result of peumococcal infection, B. Derived from pneumoconiosis, C. Detective by precipitation recation, D. Increased in peumococcal in fection', 'role': 'user'}, {'content': "Answer: D \nExplanation: An abnormal protein that precipitates with the somatic O antigen of streptococcus pneumoniae appears in the acute phase sera of pneumonia but disappear during convalescence. It is known as C-reactive protein. it is not an antibody produced as a result of pneumococcal infection. It is an acute phase substance and it'itsoduction is stimulated by a bacterial infection, inflammation an, malignancy Reference:Ananthanarayan & paniker's 9th edition, pg no: 223 <\\p>", 'role': 'assistant'}]