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 six-membered cyclic ether with an oxygen atom is called: 
 Options:  <0> Oxolane <1> Oxano <2> Dioxane <3> Oxirano. <4> Oxetano.
chemistry

Question: The order of the stages of the cell cycle is: 
 Options:  <0> S, G1, Mitosis, G2. <1> G2, G1, S, Mitosis. <2> G1, Mitosis, G2, S. <3> S, G0, Mitosis, G1. <4> G1, S, G2, Mitosis.
biology

Question: The p53 factor induces: 
 Options:  <0> Survival. <1> Proliferation. <2> Senescence <3> Apoptosis <4> Increase.

biology