This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
Equinus deformity refers to ? 
Select and explain. 
A. Inversion of foot, B. Eversion of foot, C. Plantar flexion at ankle, D. Dorsi flexion at ankle
C: Plantar flexion at ankle
Answer: C: Plantar flexion at ankle 
Explanation: Equinus deformity refers to plantar flexion at ankle joint with inability to do dorsi-flexion.It may be either congenital or acquired.Most common cause is contracture of gostracnemius or soleus or both.