• Adipose tissue is another type of loose connective tissue and not dense.
• Bones have a hard and non-pliable ground substance.
• Blood is a fluid connective tissue because it contain the above liquid and few gases.
• Yes, most of the cartilages in vertebrate embryo are replaced by bone in adult.
• At the age of 25 cartilages are replaced by bones with the help of Ca+ .    
• In which, the growth is retared.
• Ans - [C] 

The correct answer is Most of the cartilages in a vertebrate embryo are replaced in adult by bones

• Cartilage is a specialized type of dense connective tissue designed to give support, bear weight and withstand tension, torsion, and bending.
• In the vertebrate embryo, the greater part of the skeleton consists of cartilage, which is gradually replaced by bone during development.
• Early in development, cartilage makes up most of the vertebrate skeleton. As an individual grows older, calcium deposits form around the skeleton, and bone eventually replaces most of the cartilage. This process is called ossification. Ossification begins in humans when the fetus is still in the womb and is not complete until early adulthood
• Hence Most of the cartilages in the vertebrate embryo are replaced in the adult by bones