What is the maximum possible range of bit-count specifically in n-bit binary counter consisting of n number of flip-flops?

What is the maximum possible range of bit-count specifically in n-bit

1.	What is the maximum possible range of bit-count specifically in n-bit binary counter consisting of n number of flip-flops?
A.	0 to 2<sup>n</sup>
B.	0 to 2<sup>n</sup> + 1
C.	0 to 2<sup>n</sup> 1
D.	0 to 2<sup>n+1/2</sup>
Answer» D. 0 to 2<sup>n+1/2</sup>