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: Dental
Figure B shows 
Select and explain. 
A. Spinal Tap Needle, B. Shortened Spinal tap needle assembled with H file, C. Side vent needle for irrigation, D. Needle with file for simultaneous filing and irrigation
B: Shortened Spinal tap needle assembled with H file
Answer: B: Shortened Spinal tap needle assembled with H file 
Explanation: None