(A) : Molecular mass of polymers is always expressed as an average
(R) : Generally, a polymer sample contains chains of verying lengths

Options

A. Both (A) and (R) are true and (R) is the correct explanation of (A)
B. Both (A) and (R) are true (R) is not the correct explanation of (A)
C. (A) is true but (R) is false
D. (A) is false but (R) is true

Answer

A