<prompt> All of the following statements about carbohydrate antigen are true, EXCEPT:It has lower immunogenicityMemory response is seenCause polyclonal B cell stimulationDoes not require stimulation by T cells  <response>: Carbohydrate C -Ag is found in the cell wall of streptococcus pneumoniae. It is independent of T cell response, so memory response is present in the carbohydrate C - Ag. Polysaccharides carbohydrates are less immunogenic than protein antigens, but are more antigenic than lipids nucleic acids. Carbohydrate Polysaccharide antigens are T- cell independent. Their immune response does not require activation of T-cells. These antigens directly stimulate B-cells without processing by antigen presenting cells. There is no memory response. Ref: Ananthanarayanan Panikers textbook of microbiology 7th ed pg 81. 