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: Microbiology
The major antigenic determinant of H.influenzae is? 
Select and explain. 
A. 'IVY protein, B. Capsular polysaccharide, C. Catalase, D. Coagulase
B: Capsular polysaccharide
Answer: B: Capsular polysaccharide 
Explanation: Ans. is `b' i.e., Capsular polysaccharide