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.

Q: Question: The state characterized by a total absence of consciousness, muscle laxity, absence of response to painful stimuli and posterior lacunar amnesia, is called: 
 Options:  <0> Drowsiness. <1> Mental absence <2> Stupor. <3> Coma. <4> Obnubilation.

A: psychology
****
Q: Question: The standard free energy of activation of a reaction is: 
 Options:  <0> The difference in free energy between the basal state of the products and the substrates. <1> The difference of the enthalpy minus the entropy of the system. <2> The basal energy of the substrates in a catalyzed reaction. <3> The additional free energy that molecules must reach to reach the state of transition. <4> The energy released from a catalysed reaction.

A: chemistry
****
Q: Question: In the filtration process, the flow velocity is: 
 Options:  <0> Directly proportional to the quantity of the cake deposited. <1> Directly proportional to the amount of materials in suspension. <2> Dependent on the degree of ionization of the substance to be filtered. <3> Dependent on the ambient temperature. <4> Inversely proportional to the quantity of the cake deposited.

A:
pharmacology
****