Oxidation of ethyl benzene with alkaline `KMnO_(4)` gives ………

The compound formed as a result of oxidation of ethyl benzene be KMnO_4 is

1=Butyne on reaction with hot alkaline KMnO_4 gives:

1-butyne on reaction with hot alkaline KMnO_4 gives:

Give equations for the oxidation of propan-1-ol with alkaline KMnO_(4) solution.

Acetylene and ethylene reacts with alk KMnO_4 to give:

Compound A was prepared by the oxidation of compound B with alkaline KMnO_(4) . Compound A on reduction with lithium aluminium hydride gets converted back to compound B. When compound A is heated with compound B in the presence of H_(2)SO_(4) , it produces fruity smell of compound C. To which family, the compounds A, B and C belongs to?