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 conditions for the preparation of 2-methyl-2-methoxypropan-1-ol from 2,2-dimethyloxirane are: 
 Options:  <1> Methanol in acid medium. <2> Lithium aluminum hydride in methanol. <3> Methylmagnesium bromide and subsequent hydrolysis. <4> Sodium methoxide in methanol. <5> Triphenylphosphine in methanol.

A: 1
****
Q: Question: In eukaryotes, group II introns are in genes: 
 Options:  <1> Of rRNA. <2> From tRNA. <3> They encode proteins in the nucleus. <4> They encode proteins in mitochondria. <5> None is correct.

A: 4
****
Q: 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.

A:
4
****