Superior vena cava is derived from:

The superior vena cava develops from the **cardinal vein**, which is a primitive venous structure in the embryonic development of the cardiovascular system. The cardinal vein forms the main venous trunk that eventually gives rise to the superior and inferior vena cavae. The aortic arch (A) is a major arterial structure, not venous. Pharyngeal arches (B) give rise to structures like the pharynx and facial arteries, not veins. The vitelline vein (D) drains the yolk sac and contributes to the development of the inferior vena cava, not the superior vena cava.

**✓ Correct: C. Cardinal vein**

✓ Correct Answer: C. Cardinal vein