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'.

Input: Consider Input: Question: A 72-year-old man with a pathological fracture in the left femur goes to the Emergency Department. After the surgical intervention, the diagnostic study was performed to find out the underlying pathology with the following findings: hemoglobin 9.5 g / dl, total protein 11 g / dl, (VN: 6-8 g / dl), serum albumin 2 g / dl, (VN 3.5-5.0 g / dl), beta 2 microglobulin 6 mg / l (VN 1.1-2.4 mg / l), serum creatinine 1.8 mg / dl (VN: 0 , 1-1.4 mg / dl). Indicate what would be the diagnostic tests necessary to confirm the most probable diagnosis: 
 Options:  <1> Radiological bone series and bone marrow aspiration. <2> Serum and urinary electrophoresis and renal function tests. <3> Bone marrow aspirate and serum calcium concentration. <4> Bone marrow aspiration and serum and urinary electrophoresis. <5> Biopsy of the pathological fracture and radiological bone series.

Output: 4


Input: Consider Input: Question: They incorporate sterols to their plasma membrane: 
 Options:  <1> Mycobacterium tuberculosis. <2> Micrococcus luteus. <3> Mycoplasma pneumoniae <4> Chlamydia trachomatis. <5> Rickettsia prowazekii.

Output: 3


Input: Consider Input: Question: The gastrointestinal system releases a peptide hormone that increases during fasting and decreases after ingestion, called: 
 Options:  <1> Leptin <2> Cholecystokinin <3> Ghrelin <4> Insulin. <5> Glycogen


Output: 3