<prompt> C-reactive protein is -An antibody produced as a result of peumococcal infectionDerived from pneumoconiosisDetective by precipitation recationIncreased in peumococcal in fection  <response>: 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 ititsoduction is stimulated by a bacterial infection, inflammation an, malignancy Reference:Ananthanarayan panikers 9th edition, pg no: 223 p 