A patient has IDDM diagnosed at age of 15 years. The most reliable indicator for diabetic nephropathy is-A patient has IDDM diagnosed at age of 15 years. The most reliable indicator for diabetic nephropathy is-
Urine albumin < 50 mg per day in 3 consecutive samples Urinary protein >550mg perday for3 consecutive samples Development of diabetic retinopathy Hematuria