1. Which of the following abnormalities is characteristically seen in rheumatoid arthritis? (a) Acetabular retroversion. (b) Acetabular protrusion. (c) Acetabular dysplasia. (d) Reduced femoral offset. (e) Femoral retroversion. Q20 Which of the following is not a risk factor for avascular necrosis of the femoral head? (a) Steroids. (b) Diuretics. (c) Sickle-cell disease. (d) Pregnancy. (e) Radiotherapy. 2. Which of the following muscles results in external rotation of the affected limb in femoral neck fracture? (a) Iliopsoas. (b) Rectus femoris. (c) Vastus lateralis. (d) Adductor magnus. (e) Gluteus maximus.
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