An animal having double circulation in a three-chambered heart is:(a) fish (b) snake (c) deer (d) sparrow

(b) snake

Cold-blooded animals like reptiles and amphibians have a three-chambered heart, and Snake is a reptile which has a double circulation in a three-chambered heart.

While fish has a single circulation in a two-chambered heart. Mammals (deer), and birds (sparrow) has a double circulation in either two and a four-chambered heart.