Select the incorrect statement with respect to cartilage .

Options

A. The intercellular material of cartilage is solid and pliable .
B. It resists compression .
C. All the cartilages in vertebrate embryo are replaced by bone .
D. Chondrocytes are cells of cartilage.

Answer

To solve the question, "Select the incorrect statement with respect to cartilage," we will analyze each option provided in the question step by step.

### Step 1: Analyze the first statement
**Statement:** The interstellar material of cartilage is solid and pliable.

**Analysis:** This statement is correct. The interstitial (or interstellar) material of cartilage, known as the extracellular matrix, is indeed solid yet pliable due to the presence of chondroitin sulfate and other components.

**Hint:** Remember that cartilage has a unique structure that allows it to be both firm and flexible.

### Step 2: Analyze the second statement
**Statement:** It resists compression.

**Analysis:** This statement is also correct. Cartilage has a high water content and a structure that allows it to withstand compressive forces, making it effective in joints and other areas where cushioning is needed.

**Hint:** Think about where cartilage is found in the body and its role in providing support and cushioning.

### Step 3: Analyze the third statement
**Statement:** All the cartilage in vertebrate embryos are replaced by bone.

**Analysis:** This statement is incorrect. While much of the cartilage in vertebrate embryos does eventually get replaced by bone through a process called endochondral ossification, not all cartilage is replaced by bone. Some cartilage persists in certain areas, such as the nose, ears, and joints.

**Hint:** Consider the developmental processes in vertebrates and where cartilage remains in the adult body.

### Step 4: Analyze the fourth statement
**Statement:** Chondrocytes are the cells of cartilage.

**Analysis:** This statement is correct. Chondrocytes are indeed the cells found within the cartilage matrix, responsible for maintaining the cartilage structure and function.

**Hint:** Remember the specific cell types associated with different connective tissues.

### Conclusion
After analyzing all the statements, the incorrect statement with respect to cartilage is the third statement: "All the cartilage in vertebrate embryos are replaced by bone."

**Final Answer:** The incorrect statement is the third one.