This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Upper limb, Subject name: Anatomy
[{'content': 'Which muscle is inseed into the floor of the inteubercular sulcus ? \nSelect and explain. \nA. Lattissimus dorsi, B. Teres major, C. Long head of biceps, D. Deltoid', 'role': 'user'}, {'content': "Answer: A \nExplanation: Lattissimus dorsi is inseed into the floor of the inteubercular sulcus Inteubercular sulcus lies between the greater and lesser tubercles. Ref: Gray's Anatomy The Anatomical Basics of Clinical Practice 41 e pg 806.", 'role': 'assistant'}]