Amit, Bhuwan, Chetan, Dilip, Lalit and Fahim are sitting in a row facing west. Chetan is between Amit and Lalit. Bhuwan is just to the left of Lalit but right of Dilip. Chetan is sitting to the immediate right of Lalit. Fahim is at the extreme left end. Which pair is sitting by the side of Dilip?

Let's analyze the arrangement step by step. All individuals face West.
For a person facing West:

Their Right points North.

Their Left points South.

Let's arrange them from North (Extreme Right) to South (Extreme Left):

"Fahim is at the extreme left end." ⟹ Fahim is at the southern-most position.

"Bhuwan is just to the left of Lalit but right of Dilip." ⟹ The relative order from North to South is: Lalit → Bhuwan → Dilip.

"Chetan is sitting to the immediate right of Lalit." ⟹ Order becomes: Chetan → Lalit → Bhuwan → Dilip.

"Chetan is between Amit and Lalit." ⟹ Amit must be to the immediate right of Chetan. Order becomes: Amit → Chetan → Lalit → Bhuwan → Dilip.

Combining all clues together with Fahim at the extreme left (South end), the final linear sequence from North to South is:

[North/Right End] Amit → Chetan → Lalit → Bhuwan → Dilip → Fahim [South/Left End]
Now we look for the neighbors of Dilip:
Dilip is seated between Bhuwan and Fahim.