<prompt> True about the orphan drug is:Developed for orphansDrugs used very rarelyDrugs used for rare diseasesRare drug for common diseases  <response>: Orphan Drugs are drugs or biological products for diagnosistreatmentprevention of a rare disease or condition, or a more common disease endemic only in resource-poor countries for which there is no reasonable expectation that the cost of developing and marketing it will be recovered from the sales of that drug.The list includes sodium nitrite, fomepizole, liposomal amphotericin B, ancrod, rifabutin, succimer, somatropin, digoxin immune Fab digoxin antibody, liothyronine T3 and many more. 