question: Q:A 5-year-old girl is brought to the physician for evaluation of a pruritic rash on her face and extremities for the last year that increases with sun exposure. Her parents report that she often seems clumsy and has had several falls in the last two weeks. Physical examination shows an erythematous, scaly rash with hyperpigmentation over the nasal bridge and cheeks as well as on the dorsal forearms and hands. Urinalysis shows high levels of neutral amino acids. The most appropriate treatment for this patient's condition includes administration of an agent that is associated with which of the following adverse effects?? 
  {'A': 'Nephrocalcinosis', 'B': 'Facial flushing', 'C': 'Pseudotumor cerebri', 'D': 'Irreversible retinopathy', 'E': 'Calcium oxalate kidney stones'},