This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thorax, Subject name: Anatomy
[{'content': 'What is the motor supply of the diaphragm? \nSelect and explain. \nA. Phrenic nerve, B. C2, C3, C4 Roots, C. Thoracodorsal nerve, D. Long thoracic nerve', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Phrenic nerve Diaphragm OrigininsertionNerve supply1.Sternal partPosterior surface of xiphoid process.* All fibers converge to insert into central tendon* MotorPhrenic nerve (C3C4C5).* Sensoryi) Centrally by phrenic nerve.ii) Peripherally by lower 6 intercostal nerves.2.Costal partInner aspect of lower 6 ribs.3.Lumbar part-i) Right crusUpper 3 lumbar vertebral bodies.ii) Left crus Upper 2 lumbar vertebral bodies.iii) From medial arcuate ligament (medial lumbocostal arch).iv) From lateral arcuate ligament (lateral lumbocostal arch).", 'role': 'assistant'}]