Let \( x = 2 \) be a root of the equation \( x^2 + px + q = 0 \) andThen\( \displaystyle \lim_{x \to 2p^+} [f(x)] \), where [.] denotes greatest integer function, is:
\( -1 \)
\( 2 \)
\( 0 \)
\( 1 \)