Let’s build it step by step (all facing the centre).
Key idea:
P is an immediate neighbour of both Q and E
So arrangement must be:
Q – P – E (in some order around P)
So P is in the middle of Q and E.
We temporarily fix:
Q – P – E
Use “Q is also neighbour of D”
So Q must sit next to D.
So around Q, we now have:
D on one side
P on the other side
So we get:
D – Q – P – E (or reverse direction)
Use “L is immediate left of E”
Since everyone faces centre:
So L must be immediately clockwise from E.
So we place:
E → L
Now chain becomes:
D – Q – P – E – L
Place remaining person
Only one seat left, which fits correctly to complete the circle.
So full circle:
D – Q – P – E – L
Find neighbours of D
From arrangement:
D sits next to: