<prompt> Ooch ronsis is fou nd in -AlkaptonuriaTyrosinemiaPhenylketonuriaHomocystinuria  <response>: Ans. is a i.e., Alkaptonuria Alkaptonuriao Deficiency of homogentistic acid oxidase.o Accumulation of homogentistic acidDestruction of connective tissueDeposition of black pigment in the sclera ear, nose cartilase, oochronsis.o Urine become dark on standing. 