Final answer:
Propranolol is not a calcium channel blocker; it is a beta-blocker. Calcium channel blockers include Amlodipine, Diltiazem, and Verapamil, which help treat cardiovascular conditions by affecting calcium entry into cells.
Step-by-step explanation:
The drug among the options that is not a calcium channel blocking drug is c. Propranolol. Propranolol is in fact a beta-blocker, not a calcium channel blocker. Calcium channel blockers include drugs such as Amlodipine, Diltiazem, and Verapamil. These medications are used to treat hypertension, angina, and some arrhythmias by preventing calcium from entering cells of the heart and blood vessel walls, thereby decreasing cardiac contractility and dilating arteries. In contrast, beta-blockers like Propranolol work by blocking the action of epinephrine (adrenaline) on the heart, reducing the heart rate and the heart's demand for oxygen.