If for real values of $x\cos\theta=x+\large\frac{1}{x}$,then

Question

$\begin{array}{1 1}(A)\;\theta\text{ is an acute angle}\\(B)\;\theta\text{ is right angle}\\(C)\;\theta\text{ is an obtuse angle}\\(D)\;\text{No value of }\theta\text{ is possible}\end{array}$