The total number of instantaneous centers for a mechanism consisting of n links are
A
$$\frac{{\text{n}}}{2}$$
B
n
C
n - 1
D
$$\frac{{{\text{n}}\left( {{\text{n}} - 1} \right)}}{2}$$
Correct Answer: $$\frac{{{\text{n}}\left( {{\text{n}} - 1} \right)}}{2}$$