<prompt> A surgeon excises a portion of liver of the left of the attachment of the falciform ligament. The segments that have been resected are -Segment la and 4Segment 1 and 4bSegment 2 and 3Segment 1 and 3  <response>: The portion of liver on the left side of falciform ligament is left anatomical lobe of liver. And in Couinauds functional segmentation of liver, the segment number 2, 3, 4a and 4b form the left liver lobe. 