instruction:
In this task, you are given a question and answer options for that question. Using this information, you have to classify each text into different topics: medicine, nursery, psychology, chemistry, pharmacology, biology.
question:
Question: The treatment consisting of keeping a material at an elevated temperature for a period of time and then cooling it slowly is called: 
 Options:  <0> Normalized <1> Tempered. <2> Annealing. <3> Restored <4> Sintered
answer:
chemistry


question:
Question: The chloride present in a solution can be determined volumetrically, by the Mohr method, using Ag (I) as a reagent. What indicator is used in this assessment ?: 
 Options:  <0> K2Cr2O7. <1> Fe2 (SO4) 3. <2> K2CrO4. <3> KSCN <4> FeSO4.
answer:
chemistry


question:
Question: They synthesize a single polyprotein precursor of all the proteins necessary for the rest of the multiplication cycle: 
 Options:  <0> Coronavirus. <1> Picornavirus <2> Rotavirus. <3> Paramyxovirus. <4> Calcivirus.
answer:

biology