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: Which of the following pairings between anticoagulant drug and mechanism of action is INCORRECT? 
 Options:  <0> Heparin - cofactor of antithrombin III. <1> Acenocoumarol - inhibits vitamin K epoxide reductase. <2> Dabigatran - inhibits thrombin. <3> Rivaroxaban - inhibits factor Xa. <4> Warfarin - inhibits the absorption of vitamin K.
answer:
medicine


question:
Question: To control the expression of certain genes according to population density, bacteria use systems of: 
 Options:  <0> Strict response <1> Two components <2> Perception of the quorum. <3> Densitometric adaptation. <4> Negative activation
answer:
biology


question:
Question: In protein biosynthesis: 
 Options:  <0> The information contained in the two DNA chains is translated. <1> The messenger RNA is translated in the 5'-3'direction. <2> Initiation occurs in the promoter sequence. <3> Start with the most abundant amino acid. <4> Start with different amino acid according to the protein to be synthesized.
answer:

chemistry