This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Muscles of Lower Limb, Subject name: Anatomy
Plantar flexion is brought about by which of these muscles - 
Select and explain. 
A. Plantaris, B. Tibialis posterior, C. Soleus, D. All the above
D: All the above
Answer: D: All the above 
Explanation: Plantar flexion is brought about muscles of calf Muscle of calf Nerve supply Function Gastrocnemius Tibial nerve Plantar flexion Soleus Plantar flexion Plantaris Functional impoance is transplantation. Tibialis posterior Plantar flexion, inversion of foot Flexor digitorum longus Flexion of phalanges, plantar flexion Flexor hallucis longus Flexion of big toe, plantar flexion Popliteus Lateral rotation of femur on tibia prior to flexion