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: Surgery
[{'content': 'Which movement is not affected in Ls root involvement \nSelect and explain. \nA. Knee extension, B. Knee flexion, C. Toe extension, D. Thigh adduction', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. Thigh adduction - Movements affected by L5 nerve root include great (long) toe extension, (main; ASIA), toe dorsiflexion, foot dorsiflexion & eversion, knee flexion and hip abduction. Although knee extension is main movement of L3 root (a/t ASIA) and assessory movement of L4 root; there is some role of L5 & S1 also because of tensor fascia lataQ (which is supplied by L4L5S1). Whereas, hip adduction is accessory movement of L3 & L4 root.', 'role': 'assistant'}]