P, Q, R, S, and T have launched a new startup. Two of them are siblings. The…

P, Q, R, S, and T have launched a new startup. Two of them are siblings. The office of the startup has just three rooms. All of them agree that the siblings should not share the same room.

If S and Q are single children, and the room allocations shown below are acceptable to all,

then, which one of the given options is the siblings?