Which GB point is above the ankle joint, three cun superior to the prominence of the lateral malleolus, between the posterior border of the fibula and the tendons of peroneus longus and brevis?

• A. GB39
• B. GB33
• C. GB30
• D. GB38

Answer: (A)

This item tests precise point location on the Gallbladder channel using surface anatomy. The described spot is three cun above the prominence of the lateral malleolus, on the posterior border of the fibula, and in the groove between the tendons of peroneus longus and brevis. That exact combination—distance from the ankle, position relative to the fibula, and the space between those tendons—matches GB39, known as Xuanzhong, the bone marrow meeting point of the Gallbladder channel. Other nearby GB points sit either higher up the leg or in different anatomical relations, so they don’t fit this specific description.