Which among the following reagents gives syn addition with alkenes?

 

Write the products of the following reaction:

An organic compound, on reaction with ${\mathrm{O}}_3$ followed by $\mathrm{Zn}$ and ${\mathrm{H}}_2\mathrm{O}$ gives:

The structure of the compound could be.

Which of the following reactions are correctly represented?

Consider the following reaction:

               Which of the following statements are wrong  about the above sequence?