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: In the receptor-mediated endocytosis intervenes: 
 Options:  <1> Only the clathrin. <2> Only the adaptin. <3> Adaptine and clathrin. <4> Chaperones <5> Only the proteins of the membrane.
[A]: 3


[Q]: Question: They incorporate sterols to their plasma membrane: 
 Options:  <1> Mycobacterium tuberculosis. <2> Micrococcus luteus. <3> Mycoplasma pneumoniae <4> Chlamydia trachomatis. <5> Rickettsia prowazekii.
[A]: 3


[Q]: Question: In what chromatographic mode is the stationary phase formed by solid particles with controlled pore size? : 
 Options:  <1> Chromatography of distribution in normal phase. <2> Distribution chromatography in reverse phase. <3> Ion pair chromatography. <4> Ion exchange chromatography. <5> Chromatography of molecular exclusion or size.
[A]:
5