Question

1. which of the following is a combining form that means “vein”?

varic/o
thromb/o
vas/o
phleb/o

Explanation:

In medical - terminology, the combining form "phleb/o" means vein. "Varic/o" relates to varicosity, "thromb/o" to clot, and "vas/o" to vessel in a more general sense.

Answer:

D. phleb/o