The following are multiple choice questions (with answers) about medical knowledge.   **Question:** A65-year-old male adult presents with chronic sinusitis, nasopharyngeal ulcers, cavitatory lung nodules and renal failure. What will be the appropriate next diagnostic step?   (A) Lung biopsy   (B) Sputum AFB and PCR for TB   (C) ANCA and evaluation for vasculitis   (D) ESR
['(C) ANCA and evaluation for vasculitis <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Lung biopsy \n (B) Sputum AFB and PCR for TB \n (C) ANCA and evaluation for vasculitis \n (D) ESR <> possible answers', '  A65-year-old male adult presents with chronic sinusitis, nasopharyngeal ulcers, cavitatory lung nodules and renal failure. What will be the appropriate next diagnostic step? <> context@']