$1$-methyl ethylene oxide when treated with an excess of $\mathrm{H}\mathrm{B}\mathrm{r}$ produces

What is the product "C" after following reactions -


 

The major product $\left[\mathrm{B}\right]$ in the following reaction is :

Consider the following reaction:

The product$\text{'}\mathrm{P}\text{'}$gives positive ceric ammonium nitrate test. This is because of the presence of which of these$–\mathrm{OH}$ group(s)?