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'.

Ex Input:
Question: The reovirus .:
Options: <1> They are released from the cell by budding. <2> They replicate their genetic material in the cell nucleus. <3> They have a lipid envelope. <4> They form virions resistant to acid pH. <5> They are transmitted by blood.

Ex Output:
4

Ex 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.

Ex Output:
4

Ex Input:
Question: In gas chromatography, derivatization is very common, with several objectives. One of those discussed below is not among them:
Options: <1> Increase the volatility of non-volatile compounds. <2> Avoid the decomposition of a compound, improving its stability. <3> Reduce the absorption on active surfaces of the walls of the column and the solid support. <4> Fragment the analyte in molecular ions of easier separation. <5> Improve the separation of closely related compounds with a very poor separation.

Ex Output:
4