Chondrin is composed of:
A. Chondroitin-6-sulphate and ossein
B. MAG and GA
C. Chondroitin-6-sulphate and hyaluronic acid
D. Chondroitin-6-sulphate and casein

Hint: Chondrin is bluish-white in colour. It is a gelatin-like substance which is obtained if we boil cartilage in water. It is nothing but a protein-carbohydrate complex. It is made up of chondral benoit and chondromyxoid. The cells of the cartilage are present in the matrix of the chondrin.

Complete answer:
To solve the given question, we must know about the chondrin.
 Chondroitin-6-sulphate is also known as brutal. It belongs to the class o-glucuronides. In this the aglycone is attached to the carbohydrates with the help of O-glycosidic bond. It is a solid which is soluble in water. It is highly acidic. It is a constituent of most of the tissues found in the human body. It is also found in blood. It is found in the cytoplasm of the cells and inside the myelin sheath of the neurons.
Ossein is the organic matrix present inside the bones. It has 95% collagen inside it. When bones are put inside hydrochloric acid, the inorganic matrix is dissolved and what is left is the ossein.
Casein is the protein which is primarily found in the milk of the mammals. It supplies the body with calcium and phosphorus.
Hyaluronic acid is found in connective tissue, epithelial tissue and neural tissue. It forms an important component of the extracellular matrix.

Since now we are aware of all the options, therefore the correct answer to the question is Chondroitin-6-sulphate and hyaluronic acid.

Note: Here it must be noted that hyaluronic acid helps in the proliferation of the cells. It can help in the growth of the malignant tumor. It helps in tissue regeneration and wound healing. The products of these hyaluronic acids are used in the eye-surgeries.