Heart is three chambered in fishes .Heart is four chambered in birds .All animals of class amphibia are characterised by two pairs of limbs

Question

Consider the following statements : 

(1) Heart is three chambered in fishes 

(2) Heart is four chambered in birds 

(3) All animals of class amphibia are characterised by two pairs of limbs 

(4) In all reptiles respiration is by lungs only 

Which of the above statements are correct ? 

(a) 1, 2, 3 and 4 

(b) 1 and 3 

(c) 2 and 4 

(d) 2, 3 and 4 

Answer 1

The correct option is: (c) 2 and 4

Explanation:

Fishes have 2 chambered heart. Birds have a four-chambered heart. Frogs, toads, newts and salamanders have four legs. But caecilians, which form the least known group of amphibians, have no limbs and only a very short tail. They resemble snakes, worms or eels.