The correct option is (b) 2 only.
Explanation
Cartilage is a specialized form of connective tissue. Unlike epithelial tissue, connective tissues are characterized by an abundance of extracellular matrix separating the cells.Statement 1 is Incorrect: Cartilage does not consist of tightly packed cells. The cells of cartilage, known as chondrocytes, are enclosed in small cavities (lacunae) and are widely spaced within the matrix. Tightly packed cells without intercellular spaces are a characteristic of epithelial tissue.
Statement 2 is Correct: The intercellular material (matrix) of cartilage is solid, pliable, and resists compression. This matrix is chemically composed of proteins (such as collagen) and sugars (specifically chondroitin sulfate).
Statement 3 is Incorrect: Cartilage is not found exclusively in the spinal cord. In fact, the spinal cord consists of nervous tissue. Cartilage is found in the tip of the nose, outer ear joints, between adjacent bones of the vertebral column (intervertebral discs), and in the limbs and hands of adults.
Key Takeaway: Cartilage is a connective tissue with a solid matrix of proteins and sugars, containing scattered chondrocytes, and is located in the nose, ear, and joints, not the spinal cord.