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 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.
[EX A]: 1

[EX 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.
[EX A]: 1

[EX Q]: Question: After ventricular systole, the volume of blood in the ventricle is:
Options: <1> Zero. <2> The telesistolic. <3> The systolic. <4> The end-diastolic. <5> Greater in the right ventricle than in the left.
[EX A]:
2