Beak of Duck(Anas) has

Tubercles for holding fish

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Transverse ridges for straining water for small animals

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Boat shaped curvature for retaining small animals

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Sharp edges for cutting fish

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Solution

The correct option is B Transverse ridges for straining water for small animals
Anas is a genus of the class Aves and its members belong to the duck family. They have bills with lamellae in the form of transverse ridges that found on the bills of most ducks.
So, the correct answer is 'Transverse ridges for straining water for small animals'.

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