Answer: B

Yunvjian is mainly used to treat headaches and toothaches caused by stomach heat and yin deficiency. The prescription uses Achyranthes bidentata to nourish kidney water and induce heat downwards; Zhengan Xifeng Decoction It is mainly used to treat strokes caused by deficiency of the liver and kidneys, hyperactivity of liver yang, internal movement of liver wind, and reversal of qi and blood. In the prescription, Achyranthes bidentata is used to draw blood downward and nourish the liver and kidneys.