If x + 4/x - 4 = 0, then the value of x2 - 4 is equal to:

Answer: Option C

$$\begin{array}{rl}& x+\frac{4}{x}=4\\ & x=2\\ & \text{So, }{x}^2-4=?\\ & x^2-4=4-4=0\end{array}$$