A 9 yrs old child has steroid dependent nephrotic syndrome for the last 5 yrs.He has received corticosteroids almost continuously during this period and has cushingoid features.The blood pressure is 120/86 mmHg and there are bilateral subcapsular cataracts.The treatment of choice is:

• A. Levamisole
• B. Cyclophosphamide
• C. Cyclosporin A
• D. Intravenous pulse corticosteroids