<prompt> Couinaud Segment IX of liver belongs to:Left anatomical lobeLeft surgical lobeRight surgical lobeRight functional lobe  <response>: Left surgical lobe Couinaud Segment IX is a pa of caudate lobe I of the left surgical liver. Left surgical liver contains segment number I, II, III IV. Left Anatomical lobe lies to the left of falciform ligament and contains only segment number III IV. Right surgical functional lobe contains segment no V, VI, VII VIII. 