<prompt> Characteristic feature of Goodpastures syndromeLumpy-bumpy deposits on immunofluorescenceSerum antibodies against alpha 3 NC1 domain of collagen - IVSerum antibodies against alpha 1 NCI domain of collagen IIIAnti DNAse antibodies positive  <response>: Ans. b Serum antibodies against alpha 3 NC1 domain of collagen - IVRef: Robbins 9thpg 912-913Goodpasture syndromeIt is type 1 RPGN a type II hypersensitivity reaction.It is characterized by serum antibodies against alpha 3 NC1 domain of collagen - IV.This shows linear GBM fluorescence, while all other Glomerulonephritis, which are type 3 Hypersensitivity reactions show granular immune deposits. 