mrcgp akt MCQ (SBA): ACE Inhibitor Cough

A 52-year-old man presents with a persistent cough for 8 weeks, productive of clear sputum. He is a non-smoker, has no other respiratory symptoms, no systemic features, and no history of asthma or allergies. A chest X-ray is normal. He was recently started on medication for hypertension. Which medication is the most likely cause of his cough?