Q.

Which food chain is NOT a part of the given food web

1 Plants → Frog → Snake → Peacock  
2 Plants → Frog → Snake → Owl  
3 Hydrophytes → Crabs → Fish → Hawk → Tiger  
4 Both (a) and (b)  

Ans.

(2)

The given image shows a food web in the ecosystem. A food web is formed when the different food chains are interconnected in the ecosystem. Food chain comprising:
Plants → Frog → Snake → Owl is not the part of this food web.