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 differential modification of RNA: 
 Options:  <1> It can result in multiple products from one gene. <2> It occurs thanks to the transcription bubble. <3> It is catalyzed by RNA polymerase I. <4> It is catalyzed by RNA polymerase II. <5> It is catalyzed by RNA polymerase III.

A: 1
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Q: Question: In the activation of the serum complement, the assembly of the Membrane Attack Complex begins with: 
 Options:  <1> C9 <2> C5b. <3> C3a. <4> C6 <5> C8.

A: 2
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Q: Question: A 60-year-old woman, diagnosed with diabetes mellitus type 2 and hypertension, consults for palpitations of weeks of evolution. Provides an electrocardiogram performed a week ago in which he is in atrial fibrillation with an average ventricular rate of 70 beats / min. In the physical examination and in a new electrocardiogram performed in consultation is in sinus rhythm. Is it necessary to anticoagulate it chronically? 
 Options:  <1> It is not necessary to anticoagulate because it has a paroxysmal atrial fibrillation and is not currently in atrial fibrillation. <2> It is not necessary to anticoagulate because it is less than 75 years old and has not had a previous stroke. <3> You must be chronically anticoagulated because you have a CHADS of 2 and a CHADS-VASc of 3. <4> Anticoagulation is not necessary, but antiaggregation with acetylsalicylic acid may be prescribed. <5> Must be anticoagulated only with subcutaneous low molecular weight heparin when in atrial fibrillation.

A:
3
****