I – True, because hindlimb ends in five digits and they are larger and muscular than forelimbs that ends in four digits II – True, because frogs are carnivorous. Due to this, alimentary canal is short and hence length of intestine is reduced III – False, because on land, the buccal cavity, skin and the lungs act as respiratory organs IV – False, heart of frog is three, chambered and it contains two atria and one ventricle