This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Physiology
Which of the following muscles plays an impoant role in lifting the left foot off the ground while walking? 
Select and explain. 
A. Left gluteus medius, B. Left gluteus maximus, C. Right adductor longus, D. Right gluteus medius
D: Right gluteus medius
Answer: D: Right gluteus medius 
Explanation: The right gluteus medius and the right gluteus minimus lift the pelvis so that the left lower limb is raised, thus permitting the left foot to be advanced forward clear of the ground.