<prompt> Which non-diphtheria corynebacterium is used as immunomodulator?C. diphtheriaeC. parvumC.hofmanniC.pseudotuberculosis  <response>: Ans. is b i.e., C. parvumThe immunomodulator Corynebacterium parvum stimulates the reticuloendothelial system and causes splenic hypertrophy. The ability of C parvum to stimulate splenic regeneration in hemisplenectomized mice and decrease susceptibility to intranasal pneumococcal challenge was studied. 