Q.

Which of the following is the longest vein in the human body?

A. Trochlear
B. Inferior vena cava
C. Saphenous vein
D. Trigeminal
Answer» C. Saphenous vein
Explanation: The great saphenous vein, the major superficial vein of the medial leg and thigh, is the longest vein in the human body. It extends from the top of the foot to the upper thigh and groin, running along the length of the lower limb. It plays an important role in re- turning blood from the superficial tissues of the leg to the heart.
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