The<br/>following substance could function as a Hapten:() A: ABO<br/>blood substance B: Small molecular chemical drug C: LPS D: Capsular polysaccharide E: Exotoxin.

Which one is not right about diagnosis of pneumonia? A: alpha-hemolytic colony grown on bloody agar plate; B: Capsular swelling reaction is used to determine serotype.; C: Bile suppresses dissolve of the colony . D: Sputum is smeared for Gram stain and examined microscopically.