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 reaction of an alkene with metachloroperbenzoic acid causes a cyclic ether which is called: 
 Options:  <0> Furano <1> Dioxane <2> Epoxide <3> Azirano <4> Lactone
chemistry

Question: The oxygen of the ethers as that of the alcohols can be protonated to generate: 
 Options:  <0> Iminium ion. <1> Alkaloxonium ions. <2> Peroxides <3> Piranos. <4> Enaminas
chemistry

Question: Creatine phosphate: 
 Options:  <0> It is a low-energy hydrolysis compound. <1> It is a compound of energy storage in the kidney. <2> It is formed from ornithine. <3> It is a compound of energy storage in the muscle. <4> It is formed from tyrosine.

biology