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'.

Q: Question: The reaction of Wolff-Kishner is one: 
 Options:  <1> Oxidation of carbonyls to give acids. <2> Reduction of carbonyls to alcohols. <3> Deoxygenation of carbonyls that takes place in an acid medium. <4> Deoxygenation of carbonyls that is carried out in an alkaline medium. <5> Carbonyl deoxygenation performed in neutral medium.

A: 4
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Q: Question: Question linked to image no. 5 A 41-year-old man referred for presenting for more than 5 years bilateral alternating gluteal pain predominantly nocturnal, which interferes with sleep and relieves with mobilization. It is accompanied by stiffness for more than 1 hour after inactivity. Denies pain, swelling or deformity to another level. It provides elementary analytics without alterations except PCR 11.5 mg / dl (N <5) and the attached radiograph. The objective radiological alteration and the most probable diagnosis would be: 
 Options:  <1> Fracture of Looser- Osteomalacia. <2> Bilateral sacroiliitis - Ankylosing spondylitis. <3> Coexistence of lytic and blastic lesions Paget's disease. <4> Blastic lesions - Prostatic adenocarcinoma with bone metastases. <5> Osteosclerosis - Lymphoma.

A: 2
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Q: Question: What analysis should be controlled in maintenance treatments with lithium salts? 
 Options:  <1> Hepatic enzymes. <2> Antinuclear antibodies. <3> Ferritin and sideremia. <4> Thyroid and renal function. <5> Tirocalcitonina.

A:
4
****