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

Multiple Choice

Which of the following statement(s) about A1c is/are TRUE?
I. Measurement of A1c correlates approximately with the lifespan of a red blood cell, about 6-8 months.
II. Normal A1c should be at 4-6%.
III. A1c gives an approximation of glucose control in a patient corresponding to the previous 3-4 months.
IV. A1c will also be raised in chronic renal failure.

A) I only
B) II only
C) II and III only
D) II, III and IV only