Answer:
The correct answer is - ischial tuberosity.
Step-by-step explanation:
The ischial tuberosity is also known as different names such as ischium, tuberosity or sit bone as it is touches the chair or bench during siting on chair or bench. This is the one of hip bone is a large swelling posteriorly of the ischium. It marks the lateral boundary of the pelvic outlet.
Thus, the correct answer is - ischial tuberosity.