Answer: A combination of factors affecting potential thrombus formation.
Explanation:
Virchow's triad describes the three factors which contribute to the thrombosis. These includes hypercoagulability, hemodynamic changes and endothelial injury. Thrombosis results from alteration in the flow of blood vessels, endothelial injury in the vascular system and alternation in the constitution of blood.
The correct answer is Antihypertensive drugs. Antihypertensive drugs cause dilation of the arteries. Antihypertensive is a class where drugs that don't fit in previous categories which are found in the alpha-blocker.
