You are answering a USMLE-style medical question. Question: A 52-year-old man presents to the physician with a 6-month history of shortness of breath and nonproductive cough. He was recently diagnosed with stage 3 embryonal carcinoma testicular cancer. Following an orchiectomy, he was placed on chemotherapy. Cardiopulmonary examination shows fine inspiratory crackles bilaterally. There is clubbing present in the fingers bilaterally. Pulmonary function tests (PFTs) show FVC is 78% of expected and FEV1/FVC ratio is 92%. A CT scan of the chest is shown. Which of the following drugs is responsible for the patient’s condition? Options: A) Bleomycin B) Carboplatin C) Cisplatin D) Ifosfamide Reply with ONLY the letter of the correct answer (A, B, C, or D). No explanation.