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Option 3 :

The diagram will be:

As all mammals are warm-blooded, the mammal circle will come inside the warm-blooded circle and the cold-blooded circle will not have any relation with any circle. 

[ alt="08.10.2018.044" src="//storage.googleapis.com/tb-img/production/18/10/08.10.2018.044.PNG">

Thus, fig.3 best represents the relationship between warm blooded animals, mammals, cold blooded animals.

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