Angina pectoris is a condition of temporary myocardial ischemia — hence, it causes reversible cell injury (IV).
Stroke involves permanent damage to brain tissue due to infarction — this is irreversible cell injury (I).
Awqat Amraz refers to the four times/phases of disease — hence, matched with 4 (II).
Diabetes mellitus is classically associated with microvascular complications like retinopathy (III).
So the correct matches are: (A)-(IV), (B)-(I), (C)-(II), (D)-(III).