Which one among the following best explains the characteristics of Class Reptilia?
1
Lung breathing, pentadactyle limbs; covered by scales; ventricle is incompletely divided into two; amnion encloses the embryo
2
Poikilothermous; pentadactyle limbs; highly glandular skin; bicondylar skull; three chambered heart; nucleated RBC
3
Aquatic, spindle shaped body, skin with scales and glands, fins present, two chambered heart; nucleated RBC
4
Sebaceous glands in the skin; four limbed; with five or fewer digits; diaphragm present; bicondylar skull; heart four chambered.