Hemostatic drug
Antibiotics are used to treat an infection, so it wouldn’t be that one. Thrombolytic drugs are used to prevent blood clots, and they thin blood. So not that one. Coagulant drugs are used to thicken things, but this is a anticoagulant. Meaning it will thin it. I think the only logical answer would be hemostatic drug.
Explanation:
Environmental physician is most likely to study the effects of air pollution on asthma.Environmental Physician focuses on the causes of disease in an environmental context.They not only study about air pollution but also ozone depletion and its effects on health, global warming etc