<prompt> In which condition vanillylmandelic acid is excreted in urineGauchers diseasePhenylketonuriaPheochromocytomaHartnups disease  <response>: In Pheochromocytoma, increased and uncontrolled synthesis of catecholamines takes place.The breakdown product of catecholamines is vanillymandelic acid, and thats get excreted in urine. 