instruction:
In this task, you are given a multiple-choice question about healthcare. Answer the question based on your information and classify your answers into '1', '2', '3', and '4'.
question:
Question: The eudismic index is a parameter with pharmacological interest that expresses the relationship between: 
 Options:  <1> Two diastereomer drugs. <2> Two bioisostero drugs. <3> Two enantiomers <4> A drug and a prodrug, structural analog. <5> Two structural modifications, one hydrophilic and one lipophilic, of a certain drug.
answer:
3


question:
Question: The recommended antibiotic treatment for acute diarrhea caused by Clostridium difficile is: 
 Options:  <1> Administer vancomycin orally. <2> Administer vancomycin intravenously. <3> Administer ciprofloxacin orally. <4> Administer metronidazole orally. <5> Administer rifaximin orally.
answer:
4


question:
Question: Hydroxylation of Lys and Pro residues in collagen requires: 
 Options:  <1> Vitamin B. <2> Vitamin A. <3> Vitamin D. <4> Vitamin C. <5> None of the above options.
answer:

4