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 microbiocidal action of iodine and chlorine and many of its derivatives is due to: 
 Options:  <1> They are oxidizing agents. <2> They bind specifically to the active centers of the enzymes. <3> They bind specifically to ribosomal proteins. <4> They induce pores in the membranes. <5> They cause the dissolution of membrane phospholipids.
[EX A]: 1

[EX Q]: Question: What is one of the differences between Alzheimer's and subcortical patients (especially Huntington and Parkinson's)? 
 Options:  <1> The ability to semantically encode the information seems to be preserved in the subcorticals, while Alzheimer's seems quite deteriorated. <2> There is greater loss of recognition memory in the subcorticals. <3> The rate of forgetfulness is slower in Alzheimer's. <4> Retrograde amnesia is temporarily graded in subcortical patients. <5> There is less loss of recognition memory in Alzheimer's.
[EX A]: 1

[EX Q]: Question: The cholera toxin: 
 Options:  <1> Inhibits protein synthesis. <2> It is hemolytic and dermonecrotic. <3> Alters the flow of electrolytes in the intestine. <4> It is formed by a single polypeptide that is cleaved by the effect of proteases. <5> It produces food poisoning.
[EX A]:
3