Concept:Cold-blooded animals are those whose body temperature changes according to the surrounding environment, as they cannot generate internal heat.
Explanation:Rohu is a fish that breathes through gills and is cold-blooded.
Frog is an amphibian that lives both on land and in water, breathing through lungs and skin, and is cold-blooded.
Cobra is a reptile having scales on its body, breathing through lungs, and is also cold-blooded.
Thus, all three animals in option D are cold-blooded.
Crow, Whale, Penguin, and Monkey are warm-blooded animals because their body temperature remains constant regardless of the surroundings.
Therefore, options A, B, and C are incorrect as each contains at least one warm-blooded animal.
Answer:Option D: Rohu, Frog, Cobra
