DIRECTIONS: The questions in this segment consists of two statements, one labelled as ?assertion 4? and the other labelled as ?reason R?. You are to examine these two statements carefully and decide if the assertion A and reason R are individually true and if so, whether the reason is a correct explanation of the assertion. Select your answers to these items using odes given below. Assertion (A): Cartilage covers the ends of bones. Reason (R): Cartilage acts as a shock absorber and reduces friction between bones.

• A. Both A and R are true and R is the correct explanation of A.
• B. Both A and R are true but R is not the correct explanation of A.
• C. Oxalic acid 
• D. A is false but R is true.