Order the Following Steps Involving the Regeneration of Ribonucleotide Reductase

Multiple Choice

Order the following steps involving the regeneration of ribonucleotide reductase that occurs in most animals so that it may carry out the formation of deoxyribonucleotides.(Note that not all steps are shown.)
1) Reduction of thioredoxin
2) Reduction of ribonucleotide reductase
3) Oxidation of thioredoxin reductase
4) Reduction of thioredoxin reductase

A) 3; 4; 1; 2
B) 2; 1; 3; 4
C) 4; 1; 2; 3
D) 4; 3; 1; 2