As we know that ,
Sharks belong to class Pisces. Whale is a mammal and Turtle belongs to class reptilian.
From above it is clear that Sharks, Whales and Turtles belong to different classes.
Hence , Option ( C ) is required answer .

On the basis of above given question , we get
Judge is different from both the thief and criminal. The thief comes under the class criminal.
From above it is clear that 'Judge' belongs to other class but 'Thief' and 'Criminal' belong to same classes .It represents a relationship in given figure .
Therefore , Option ( C ) is correct answer .

According to question ,
Goat is different from cow . But both give milk . So, we get the best relationship between milk, goat, cow and hen .As shown in given figure .
Therefore , required answer is option ( C ).

According to question , we can say that
Every thing is composed ofmolecules.
Sun is different from Moon.
Therefore , required answer will be option ( D ).

As per the given above question ,we can see that
Sea is a part of Earth . Sun is the star .
From above it is clear that Earth and Sea belong to same class but Sun belongs to different class .
Hence , required answer is option ( C ) .

As we know that
Delhi is separate state while Lucknow is part of Uttar Pradesh.
From above it is clear that Lucknow and Uttar Pradesh belong to same class and Delhi belongs to other class.
Hence , required answer will be option ( C ) .

From above given question , we can say that
Bonus and Dividend are different from each other but both these are parts of profit.
From above it is clear that option ( B ) represents the best relationship between Profit, Dividend and Bonus . As shown in given venn - diagram .

According to above given question , we know that
Cats are different from rats.
But both are animals.
From above it is clear that option ( D ) represents the best relationship between Cats, Rats and Animals . As shown in given venn - diagram .

According to above all given informations in question , we can say that
Diagram ( B ) represents the best relationship between Cricket players , Tennis players and Hockey players .As shown in given venn - diagram .

On the basis of above given questions , we find the best relationship between them .
Pigeons come under the class Birds.
But dog is different (mammal).
It is clear that option ( A ) represents the best relationship between Pigeons, Birds and Dogs . As shown in given venn - diagram .