Task: Question Answering
Input (English): Question: The deoxyribonucleotides are synthesized: 
 Options:  <1> From the ribonucleotide triphosphate. <2> From the ribonucleotides diphosphate. <3> From NADPH. <4> By oxidation of ribonucleotides. <5> For DNA polymerase III.
Output (English): 2