Task: Question Answering
Input (English): Question: The phosphate groups of the nucleotides: 
 Options:  <1> They are stabilized by binding to divalent anions. <2> They form low-energy hydrolysis bonds. <3> They are called X, Y and Z as they move away from ribose. <4> They are attached to the C3' of the ribose. <5> They present negative charge.
Output (English): 5