An alkene on oxidative ozonolysis gives adipic acid. The alkene is

An alkene on oxidative ozonolysis gives adipic acid. The alkene is cyclohexene.

Alcohols, aldehydes, ketones, or carboxylic acids can be produced when ozone is used to oxidize alkenes. Alkynes are converted to acid anhydrides or diketones through ozonolysis. If there is water involved in the reaction, the acid anhydride passes through hydrolysis and produces two carboxylic acids.

Hence, option A is correct.