Which of the following is true about the ischium？

A.The body of ischium forms the posterior fifth of the acetabulum

B.The lesser sciatic notch is located above the ischial spine

C.The greater sciatic notch is part of the ischium

D.The lowest position of the ischial tuberosity is palpable on the body surface

正确答案：The lowest position of the ischial tuberosity is palpable on the body surface