This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteriology, Subject name: Microbiology
What is the main constituent of pneumococcal capsule 
Select and explain. 
A. Polypeptide, B. Lipid, C. Polysaccharide, D. lipoarabinomannan
C: Polysaccharide
Answer: C: Polysaccharide 
Explanation: The main constituent of the pneumococcal capsule is a polysaccharide. because of its acidic and hydrophilic propeies, protects the cocci from phagocytosis. capsulated S.pneumoniae are not phagocytosed effectively in fluid media or exudates. However, they are susceptible to 'surface phagocytosis', being engulfed against a firm surface, such as fibrin clot or epithelium. The enhanced virulence of Type 3 streptococci is due to the presence of capsular material. Ref: Textbook of microbiology; Ananthanarayan and paniker's; Pg:226