Comprehension:
A round table has seven chairs around it. The chairs are numbered $1$ through $7$ in a clockwise direction. Four friends, Aslam, Bashir, Chhavi, and Davies, sit on four of the chairs. In the starting position, Aslam and Chhavi are sitting next to each other, while for Bashir as well as Davies, there are empty chairs on either side of the chairs that are sitting on.
The friends take turns moving either clockwise or counterclockwise from their chair. The friend who has to move in a turn occupies the first empty chair in whichever direction (s)he chooses to move. Aslam moves first (Turn $1$), followed by Bashir, Chhavi, and Davies (Turns $2$, $3$, and $4$, respectively). Then Aslam moves again followed by Bashir, and Chhavi (Turns $6$, and $7$, respectively).
The following information is known.
- The four friends occupy adjacent chairs only at the end of Turn $2$ and Turn $6$.
- Davies occupies Chair $2$ after Turn $1$ and Chair $4$ after Turn $5$, and Chhavi occupies Chair $7$ after Turn $2$.
Which of the chairs are occupied at the end of Turn $6$?
- Chairs numbered $4,5,6$, and $7$
- Chairs numbered $1,2,3$, and $4$
- Chairs numbered $2,3,4$, and $5$
- Chairs numbered $1,2,6$, and $7$