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: The micro RNA (miRNA): 
 Options:  <0> They are coding RNAs. <1> They inhibit transcription. <2> They inhibit the translation. <3> Activate transcription. <4> Activate the translation.
chemistry

Question: The SO2 molecule is: 
 Options:  <0> Linear, with the S atom in the center. <1> Linear, with one of the atoms of O in the center. <2> Angular, with the S atom in the center and with an angle close to 120º (equilateral triangle) and a free pair of electrons. <3> Angular, with one of the atoms of O in the center and with an angle of approximately 120º (equilateral triangle) and a pair of free electrons. <4> Angular, with the S atom in the center and with an angle close to 109º (tetrahedron) and two pairs of free electrons.
chemistry

Question: The triple point of a phase diagram of a component: 
 Options:  <0> Presents 3 degrees of freedom, according to the rule of the phases. <1> Presents 1 degree of freedom, according to the rule of the phases. <2> It is characterized because the liquid and gas phases are indistinguishable. <3> It is characterized because there are three phases in equilibrium. <4> It is characterized because there are four phases in equilibrium.

pharmacology