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'.

Input: Consider Input: Question: Friedel-Crafts alkylation reactions lead to products that:
Options: <1> They facilitate diazotization reactions. <2> They facilitate the reactions of formation of ethers. <3> Activate the aromatic ring against other substitutions. <4> They deactivate the aromatic ring against other substitutions. <5> None of the above.

Output: 3

Input: Consider Input: Question: In the technique of atomic absorption spectrometry, the use of an electrothermal atomizer instead of the flame provides:
Options: <1> Greater accuracy <2> Greater precision. <3> Greater sample consumption <4> Longer analysis times. <5> Greater sensitivity

Output: 5

Input: Consider Input: Question: Plasma ICP is more suitable for rapid multielemental analysis than flame atomic absorption methods because:
Options: <1> The linearity interval is not wide, which allows for very sensitive analyzes. <2> The ICP has several possibilities to introduce the sample using different types of nebulizers. <3> They use two photomultiplier tubes, one for the ultraviolet region and the other for the visible one. <4> It has load-coupled silicon solid-state detectors that allow simultaneous monitoring of a large number of lines, reducing analysis time, sample volume and improving detection limits. <5> It is not correct, because with the ICP plasma, multielemental analysis can not be done.
Output: 4