This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head & Neck, Subject name: Anatomy
Blood supply of spinal cord is through - 
Select and explain. 
A. Anterior spinal artery, B. Vertebral artery, C. Deep cervical artery, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Ans. is 'd' i.e., All of the aboveArteryBranch ofTerritory of supply1. Anterior spinal artery (1 in number)4th part of vertebral arteryVentral 2/3rd cross section of spinal cord2. Posterior spinal arteries (2 in number)4th part of vertebral artery, sometimes from posterior inferior cerebellar arteryPosterior l/3rd of the cross-section of spinal cord3. Segmental spinal branches(a) Vertebral artery (2nd part)(b) Deep cervical artery(c) Ascending cervical artery(d) Posterior intercostal arteries(e) Lumbar arteries# Subclavian artery# Costocervical trunk of 2nd part of subclavian# Branch of thyrocervical trunk# Thoracic aorta# Abdominal aorta# (a), (b) and (c) supply the cervical segments and uppermost thoracic segments up to T2# (d) and (e) supply rest of the cord