Final answer:
Tissue plasminogen activator (tPA) is used to dissolve blood clots by converting plasminogen to plasmin, aiding in clot degradation especially following a thrombotic stroke when administered within 3 hours. The correct option is A.
Step-by-step explanation:
The goal of using the drug called tissue plasminogen activator (tPA) is the dissolution of blood clots. tPA is an enzyme that catalyzes the conversion of plasminogen to plasmin, the primary enzyme involved in the breakdown of clots. Thrombolytic agents like tPA are critical for treating thrombotic strokes by degrading the abnormal clot that is obstructing blood flow to the brain.
It's important to administer tPA within a 3-hour window after the onset of a thrombotic stroke for the best prognosis. Furthermore, ongoing research looks at novel thrombolytic agents derived from snake venom, which might offer therapeutic benefits. Hence, A is the correct option.