Let \(f\left( x \right) = \left\{ {\begin{array}{*{20}{c}} {\frac{{\tan \left( {2p - 7} \right)x + \tan 3x}}{x},}\\ {p - q,}\\ {q\left( {\frac{{\sqrt {{x^2} + x} - \sqrt x }}{{{x^{\frac{3}{2}}}}}} \right),} \end{array}} \right.\begin{array}{*{20}{c}} {x < 0}\\ {x = 0}\\ {x > 0} \end{array}\). If f(x) is continuous at x = 0, then \(\frac{q}{p}\) =
1
\(\frac{2}{3}\)
2
\(\frac{-2}{3}\)
3
\(\frac{3}{2}\)
4
\(\frac{-3}{2}\)