An unknown compound (A) was soluble in ether but only slightly soluble in water. It burned with a clear blue flame and combustion analysis showed it to have the molecular formula of C₅H₁₂O. It gave a positive test with the Jones reagent producing a new compound (B) with a formula of C₅H₁₀O. Compound B gave a positive iodoform test and formed a semicarbazone. Compound A on treatment with sulfuric acid produced a hydrocarbon (C) of formula C₅H₁₀. Hydrocarbon C readily decolorized a Br₂–CH₂Cl₂ solution, and on ozonolysis, produced acetone as one of the products. Identify the structure of each of the lettered compounds.