Which point lies 1 cun below the prominence of the medial malleolus, in the groove formed by two ligamentous bundles?

• A. KD 4
• B. KD 5
• C. KD 3
• D. BL 66

Answer: (B)

This question tests precise point location using bone landmarks and the natural grooves around the medial ankle. The description—one cun below the prominence of the medial malleolus, in the groove formed by two ligamentous bundles—matches the Kidney point that sits in that specific ankle groove. That point lies just under the inner ankle bone, in the ligament-created channel where the Kidney channel travels, about one finger-breadth (1 cun) below the malleolus.

Think of it as using a reliable landmark (the bump of the medial malleolus) and a characteristic groove (between two ligaments) to pin down the exact spot along the Kidney channel. The other options are located in different areas: behind the malleolus in a depression toward the Achilles tendon, on a different part of the medial foot, or on a different meridian, so they don’t fit this precise description.