Source: Exemplar
Single circulation i.e., blood flows through the heart only once during one cycle of passage through the body, is exhibited by
Options
Option A
Labeo, Chameleon, Salamander
Option B is correct
Hippocampus, Exocoetus, Anabas
Option C
Hyla, Rana, Draco
Option D
Whale, Dolphin, Turtle