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: Unknown
Fishy odour syndrome which of the following is used in treatment 
Select and explain. 
A. Biotin, B. Thiamine, C. Riboflavin, D. Vit. A
C: Riboflavin
Answer: C: Riboflavin 
Explanation: Ref. Textbook of Biochemistry for Medical Students. Page. 467
 
Trimethylaminuria

Trimethylaminuria causes a strong body odour usually described as like rotting fish, faeces or garbage.
The odour is created when the body isn’t able to process trimethylamine.
This is a smelly chemical that’s produced in the gut, particularly when certain choline-rich foods are digested
It’s due to FMO3 gene defect
Riboflavin (vitamin B2) supplements to enhance any residual FMO3 enzyme activity.