Answer-A. Lacunar ligamentIt is also called Gimbernat's ligament.From the medial end, deep fibres curve horizontally backward to the medial side of pectin pubis forming lacunar ligament.This ligament is trainagular in shape, with the apex attached to the pubic tubercle.Its sharp lateral edge forms the medial boundary of the femoral canal, which is the site of production of femoral hernia.