This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nephritic & Nephrotic Syndrome, Subject name: Pediatrics
Drug of choice for treatment of Steroid Resistant Nephrotic syndrome is: 
Select and explain. 
A. Prednisolone, B. Levamisole, C. Cyclophosphamide, D. Cyclosporine
D: Cyclosporine
Answer: D: Cyclosporine 
Explanation: Drug of choice for treatment of Steroid Resistant Nephrotic syndrome is: Calcineurin inhibitors (Cyclosporine or Tacrolimus)