Some statements regarding the reaction:
 
are given below. Select the correct statement(s).

 $Q_1$ is a pure compound and optically inactive due to internal compensation

$Q_2$ is a binary mixture and is optically inactive due to external compensation.

In the P to $Q_1$ conversion step the  $B{r}_2$ adds on  P in a syn manner and the intermediate formed is a cyclic brominium ion.

P is a trans-alkene