Doctors examining a senior citizen conclude that a large blood clot has formed in the patient's leg. The doctors need to dissolve the clot before it is released and causes damage to vital organs. What type of drug would MOST LIKELY be given to help dissolve a deep vein clot?
a. a herostatic drug
b. a thrombolytic drug
c. a clotting factor X inhibitor
d. an antibiotic drug