<prompt> True regarding orphan drug isRare drug for common diseaseUsed rarelyUsed for rare diseasesUsed for orphans  <response>: Orphan drugs are used for rare diseasesorphan diseases-affecting less than 2 lakh people.oraphan drug used to treat orphan disease for orphan patient. Eg: N acetylcysteine, Deferiprone, Fomepizole,Anagrelide, erythropoietin. Ref: K.D.Tripati.7th ed. Pg 5 