The terpene shown is treated with excess $\mathrm{O}{}_3$ followed by $\mathrm{Zn}$/$\mathrm{H}{}_2\mathrm{O}$, cleaving both C=C bonds. How many different organic compounds are formed (count the stereoisomers of the one chiral centre as one compound)?

The compound shown is limonene. Cleavage of the isopropenyl group releases methanal; cleavage of the ring C=C opens the ring and gives one open-chain compound containing a ketone, an aldehyde and a second ketone (three C=O groups). That is 2 different compounds, not 3.