Given below are two statements. One is labelled as Assertion (A) and the other is labelled as reason (R). 

Assertion (A) : Matrix of cartilage is slightly pliable.

Reason (R) : It has chondroitin salts.

In the light of the given statements, choose the correct answer from the options given. 

Both (A) and (R) are true and (R) is the correct explanation of (A).

Cartilage is a type of connective tissue that is composed of cells called chondrocytes and a matrix that is rich in collagen fibers and proteoglycans. The matrix of cartilage is slightly pliable, allowing it to resist compression and maintain its shape.

The assertion (A) is true in that the matrix of cartilage is slightly pliable. This property allows cartilage to absorb shocks and provide support to different parts of the body.

The reason (R) is also true in that chondroitin salts are a type of proteoglycan that are found in the matrix of cartilage. Proteoglycans are large molecules that consist of a protein core and long chains of complex sugars called glycosaminoglycans (GAGs). The GAGs in cartilage matrix are highly negatively charged and attract water, which contributes to the matrix's ability to resist compression and maintain its pliability.

Therefore, both the assertion (A) and reason (R) are true, and the reason (R) correctly explains why the matrix of cartilage is slightly pliable.