TASK DEFINITION: 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'.
PROBLEM: Question: A primary standard solution in a titration should not: 
 Options:  <1> Be prepared from a high purity reagent. <2> Have an exactly known concentration. <3> Keep your composition over time. <4> React instantly. <5> Give rise to secondary reactions.

SOLUTION: 5

PROBLEM: Question: If the normal reduction potential of the pair Zn2 + / Zn is -0.76 V: 
 Options:  <1> Aqueous solutions of Zn2 + at pH = 0 release oxygen. <2> Putting metallic Zn in aqueous solution at pH = 0 releases oxygen. <3> Aqueous solutions of Zn2 + at pH = 0 give off hydrogen. <4> By putting metallic Zn in aqueous solution at pH = 0, hydrogen is evolved. <5> Zn2 + dismutates in aqueous solution at pH = 0.

SOLUTION: 4

PROBLEM: Question: Indicate which of the following is an acquired corpuscular hemolytic anemia: 
 Options:  <1> Paroxysmal nocturnal hemoglobinuria. <2> Deficit of glucose 6 phosphate dehydrogenase. <3> Minkowski-Chauffard disease <4> Sickle-cell anaemia. <5> Pyruvatokinase deficiency.

SOLUTION:
1