Which organism cannot be cultured ?
Ans. is 'd' i.e., Pneumocytstis jiroveci "The life cycle of pneumocystis probably involves sexual and asexual reproduction, although definitive proof awaits the development of a reliable culture system". - Harrison "Rhinosporidium seeberi has not been cultivated in media". - Ananthnarayan.
Klebsiella rhinoscleromatis
Klebsiella ozaenae
Klebsiella granulomatis
Pneumocystis jiroveci