<prompt> Which is not pyridoxine dependenta Homocystinuria b Maple syrup urine diseasec Oxaluriad Xanthinuriacbdabac  <response>: Pyridoxal phosphate-dependent conditions are homocystinuria, cystathioninuria, oxaluria and xanthurenic aciduria.Dont get confused option d xanthinuria with xanthurenic aciduria. Both are different conditionsIn xanthurenic aciduria, there is excretion of xanthurenic acid xanturenate, an alternative metabolite of tryptophan metabolism. This is pyridoxine-dependent.In xanthinuria, there is excessive excretion of xanthine in the urine. This is due to deficiency of enzyme xanthine oxidase and it is not pyridoxine responsive.About option bMaple syrup urine disease is due to defective branched chain u-ketoacid dehydrogenase enzyme, and it may be associated with thiamine vitamin B1 deficiency. 