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: Surgery
Bennett's fracture is fracture dislocation of base of --- metacarpal: 
Select and explain. 
A. 4th, B. 3rd, C. 2nd, D. 1st
D: 1st
Answer: D: 1st 
Explanation: D i.e. 1st