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: Organomagnesium compounds are commonly referred to as: 
 Options:  <1> Lipshutz <2> Birch. <3> Grignard. <4> Noyori <5> Blanc.

Output: 3


Input: Consider Input: Question: Acetylsalicylic acid is a compound whose pKa is 3.5. What percentage of a dose of this product can be absorbed in the stomach fasting (pH 1.5)? 
 Options:  <1> Less than 10% <2> Between 10% and 20%. <3> More than 90% <4> Between 20% and 40%. <5> 50%

Output: 3


Input: Consider Input: Question: Voltammetry of anodic redissolution: 
 Options:  <1> It is always carried out with mercury film electrodes. <2> It uses an oxidation process with chemical agents. <3> It is based on the formation of mercury salts in the electrode. <4> It does not need background electrolyte. <5> It has an electrodeposition stage.


Output: 5