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 Input:
Question: The use of monolithic columns and continuous beds in liquid chromatography is already very common. To this end:
Options: <1> Microporous membranes are used so that the interaction between a solute and the matrix takes place in the final part of the pore. <2> A separation medium is introduced with a greater degree of continuity than the stationary particle phase so that the mobile phase is forced to traverse the large pores of the medium, improving mass transport. <3> Monodisperse particles are used as a stationary phase in order to improve mass transfer. <4> Flexible organic gels are used from microporous polymers in order to decrease the flow rates. <5> Columns filled with small particles of polymerized silica are used.

Ex Output:
2

Ex Input:
Question: Clostridium perfringens can cause various infections, including:
Options: <1> The anthrax. <2> Pseudomembranous colitis. <3> The gas gangrene. <4> Tetanus <5> The syndrome of scalded skin.

Ex Output:
3

Ex Input:
Question: Pseudomonas aeruginosa is:
Options: <1> Able to ferment a large variety of sugars. <2> Often resistant to many antibiotics for medical use. <3> Responsible for toxi-alimentary infections. <4> Part of the normal microbiota of the skin. <5> A commensal bacterium of the digestive tract.

Ex Output:
2