Which one of the following alkenes reductive ozonolysis will give a mixture of ketones

 Alcohols, aldehydes, ketones, and carboxylic acids can be produced by oxidizing alkenes with ozone. Ozonolysis converts alkynes into acid anhydrides or diketones. If there is water in the reaction, the acid anhydride hydrolyzes to produce two carboxylic acids. Ozone cracking is another name for elastomer ozonolysis.

Therefore the correct option (C).