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: A lack of interest in carrying out sexual relations or behavior in general is, more properly: 
 Options:  <1> Sexual aversion <2> Lack of sexual desire or inhibited sexual desire. <3> Impotence or anorgasmia. <4> Excitation disorder. <5> Orgasmic dysfunction
2

Question: Transketolase catalyzes the transformation of ribose-5-phosphate and xylulose-5-phosphate into: 
 Options:  <1> Two molecules of ribulose-5-phosphate. <2> Sedoheptulose-7-phosphate and glyceraldehyde-3-phosphate. <3> Fructose-6-phosphate and erythrose-4-phosphate. <4> Glyceraldehyde-3-phosphate and glucose-6-phosphate. <5> 6-Phosphogluconate and glyceraldehyde-3-phosphate.
2

Question: Circadian rhythms are established in: 
 Options:  <1> Pineal gland. <2> Suprachiasmatic nucleus. <3> Retina. <4> Spinal cord. <5> Centromedianic thalamic nucleus.

2