This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
CRP is an acute-phase protein in inflammatory processes. Which among the following is the expansion of 'C' in CRP? 
Select and explain. 
A. Concanavalin A, B. Chondroitin sulfate in series with ARP, BRP, C. Capsular polysaccharide of pneumococcus, D. Cellular
C: Capsular polysaccharide of pneumococcus
Answer: C: Capsular polysaccharide of pneumococcus 
Explanation: "Acute-phase proteins" include C-reactive protein, 1-antitrypsin, haptoglobin, 1-acid glycoprotein, and fibrinogen. CRP, so named because it reacts with the C polysaccharide of pneumococci. The elevations of the levels of these proteins vary from as little as 50% to as much as 1000-fold in the case of CRP.CRP is used as a marker of tissue injury, infection, and inflammation, and there is considerable interest in its use as a predictor of ceain types of cardiovascular conditions secondary to atherosclerosis. It also can stimulate the classic complement pathway. Ref: Murray R.K., Jacob M., Varghese J. (2011). Chapter 50. Plasma Proteins & Immunoglobulins. In D.A. Bender, K.M. Botham, P.A. Weil, P.J. Kennelly, R.K. Murray, V.W. Rodwell (Eds), Harper's Illustrated Biochemistry, 29e.