challenge: What is the systematic name of the enzyme Mycoredoxin?
  
  A. Arseno-mycothiol:mycoredoxin oxidoreductase
  B. Arseno-mycothiol:mycoredoxin synthase
  C. Arseno-mycothiol:mycoredoxin reductase
  D. Arseno-mycothiol:mycoredoxin hydrolase
  Answer: 