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: Ultraviolet radiation changes the structure of DNA by: 
 Options:  <1> Rupture of phosphodiester bonds. <2> Deamination of nitrogenous bases. <3> Depurinization <4> Formation of cyclobutyl rings of pyrimidines. <5> Hydroxylation of nitrogenous bases.
answer:
4


question:
Question: Pseudomonas aeruginosa is: 
 Options:  <1> Able to ferment a large variety of sugars. <2> Often resistant to many antibiotics for medical use. <3> Responsible for toxi-alimentary infections. <4> Part of the normal microbiota of the skin. <5> A commensal bacterium of the digestive tract.
answer:
2


question:
Question: The complexes of cobalt (III): 
 Options:  <1> They are all neutral or anionic. <2> They form the basis of our knowledge about the properties and reaction mechanisms of octahedral complexes. <3> They are usually flat-squares. <4> They present very fast substitution kinetics. <5> Almost all are prepared by replacing some ligands with others.
answer:

2