Which of the Following Statement(s) About A1c Is/are Untrue

Multiple Choice

Which of the following statement(s) about A1c is/are untrue?

A) Measurement of A1c correlates approximately with the lifespan of a red blood cell, about 6-8 months.
B) Normal A1c should be at 4-6%.
C) A1c gives an approximation of glucose control in a patient corresponding to the previous 3-4 months.
D) A1c will also be raised in chronic renal failure.