This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
In which condition vanillylmandelic acid is excreted in urine 
Select and explain. 
A. Gaucher's disease, B. Phenylketonuria, C. Pheochromocytoma, D. Hartnup's disease
C: Pheochromocytoma
Answer: C: Pheochromocytoma 
Explanation: In Pheochromocytoma, increased and uncontrolled synthesis of catecholamines takes place.
The breakdown product of catecholamines is vanillymandelic acid, and thats get excreted in urine.