Final answer:
The 'sit bones' in yoga refer to the ischium bones in the pelvis.
Step-by-step explanation:
In yoga, the bones in the pelvis that are referred to as the 'sit bones' are the ischium bones. The ischium is one of the three bones that fuse together to form the hip bone. The sit bones are the bony prominences at the bottom of the pelvis that you feel when you sit down.