This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Root of Neck, Subject name: Anatomy
[{'content': 'Thyrocervical trunk is branch of which part of subclavian artery- \nSelect and explain. \nA. 1st, B. 2nd, C. 3rd, D. None', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., 1st Branches of subclavian arteryFirst partVertebral arteryInternal thoracic arteryThyrocervical trunk ; Branches of thyrocervical trunk are :Inferior thyroid arterySuprascapular arterySuperficial cervicalSecond parto Costocervical trunk : It gives following branches :Deep cervical arterySuperior intercostal arteryThird parto Dorsal scapular artery.", 'role': 'assistant'}]