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
Muscle attached to medial lip of linea aspera of femur ? 
Select and explain. 
A. Sho lead of biceps femoris, B. Vastus lateralis, C. Vastus intermedius, D. Vastus medialis
D: Vastus medialis
Answer: D: Vastus medialis 
Explanation: Posterior border of femur shaft is in the form of a broad roughened rigde, called linea aspera. o The lines aspera has distinct medial and lateral lips.Attachments on linea aspera are :i) Lateral lip : Vastus lateralis (in upper half), sho head of biceps femoris, lateral intermuscular septum.ii) Medial lip : Vastus medialis, medial intermuscular septum.iii) Three adductors : Adductor longus, brevis and magnus.