Final answer:
Sanguineous drainage indicates fresh bleeding and is red in color, consistent with new blood from broken capillaries, as opposed to serous or serosanguineous drainage which is less intense or includes plasma, and purulent drainage which signifies infection.
Step-by-step explanation:
The type of drainage that indicates fresh bleeding is B. Sanguineous drainage. Sanguineous drainage is characterized by its red color and is typically indicative of new blood leaking from broken capillaries. It is often observed in wounds that have recently been sustained or in surgical sites that are still healing.
In contrast, serous drainage is typically clear to straw-colored, indicating plasma. Serosanguineous drainage is a mixture of blood and serous fluid, resulting in pink or light red fluid, often seen during the healing process but not as intense as sanguineous drainage. Lastly, purulent drainage indicates an infection, characterized by its thick, pus-like appearance, which is usually yellow, green, or brown in color.