This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Systemic Bacteriology Pa 1 (Gram Positive Cocci, Gram Negative Cocci), Subject name: Microbiology
In 'C Reactive Protein', the letter 'C' is sho form for ? 
Select and explain. 
A. Cellular, B. Cytoplasmic, C. Capsular polysaccharide of pneumococcus, D. Concanavalin A
C: Capsular polysaccharide of pneumococcus
Answer: C: Capsular polysaccharide of pneumococcus 
Explanation: C REACTIVE PROTEIN (CRP) Annular pentameric protein seen in blood plasma. First identified in the serum of patients which reacted with capsular polysaccharide of pneumococcus. The levels of CRP increases in inflammatory states (acute phase protein). Activates the complement system by binding to phosphocholine expressed on the surface of some bacteria and dead cells. It is synthesised in the liver.