au-amc MCQ (SBA): Community-acquired pneumonia in older adults

A 72-year-old woman in an aged care facility develops low-grade fever, productive cough and right basal crackles. She is haemodynamically stable and saturating 95% on room air. Chest X-ray suggests a right lower lobe pneumonia. She can be managed in the facility with GP oversight. According to Therapeutic Guidelines summary table, which oral antibiotic is recommended first-line?