Calcium channel blockers used in HTN are all except:
Captopril is an ACE inhibitor- prototype ACE inhibitor all others mentioned in options are calcium channel blockers- all are dihydropyridines (Ref- Essentials of medical pharmacology K D TRIPATHI 8th Edition)
Amlodipine
Clevidipine
Captopril
Nifedipine
Cardiovascular system