Five brothers Drake, David, Dany, Derk and Dim are sitting on a bench facing north. Derk is sitting to the immediate right of Dany. Dim is sitting exactly between Drake and David. No one sits to the left of Drake. Who sits to the immediate left of Dany?

David 

Let the positions of the five brothers be numbered 1-5,

1. No one sits to the left of Drake.

⇒ Drake sits on the left extreme at position 1.

2. Dim is sitting exactly between Drake and David.

⇒ Dim is placed at position 2 and David at 3

3. Derk is sitting to the immediate right of Dany.

⇒ If Dany sits at position 4, Derk is placed at position 5.

Thus, David sits to the immediate left of Dany.