Given below are two statements: one is labelled as Assertion A and other is labelled as Reason R Assertion A: The rate of blood flow through the kidneys increases with age and so does the rate of glomerular filtration, which at the age of 80 years is nearly double as compared to of that at the age of 25 years. Reason R: With increasing age, decreased amount of blood passes through the kidneys' filtration system, resulting in adversely affecting the elimination of waste products and reabsorption of nutrients. In the light of the above statements. Choose the correct answer from the options given below