<prompt> Which structure lies in the intersigmoid recess -Left UreterLeft Ureter and left common iliac arteryLeft Ureter and left common iliac veinLeft Ureter, left common iliac artery and left common iliac vein  <response>: Left ureter crossing the bifurcation of left common iliac artery lies behind intersigmoid recess, which is a surgical guide for locating left ureter. 