**Core Concept**
Collagen is a crucial component of the extracellular matrix in cartilage, providing tensile strength and elasticity. In healthy cartilage, collagen type II is the primary collagen type, but during pathological conditions like osteoarthritis or hyperophy, the composition of collagen may change.

**Why the Correct Answer is Right**
Type II collagen is the primary collagen type in hyaline cartilage, which is the type of cartilage found in the joints. During hyperophy of the cartilage, the production of type II collagen increases to accommodate the increased stress and load on the joint. This is a common adaptation in conditions like osteoarthritis, where the cartilage becomes thicker and more fibrous.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because type I collagen is primarily found in skin, bone, and tendon, not in hyaline cartilage.
**Option B:** This option is incorrect because type III collagen is primarily found in blood vessels, not in hyaline cartilage.
**Option C:** This option is incorrect because type VI collagen is a beaded filament collagen found in the extracellular matrix, but it is not the primary collagen type in hyaline cartilage.

**Clinical Pearl / High-Yield Fact**
In cases of osteoarthritis, the increased production of type II collagen in the cartilage can lead to a more fibrous and less elastic cartilage, contributing to the progression of the disease.

**Correct Answer: C. Type II collagen.**