A 45 year old was given steroids after renal transplant.After 2 years he had difficulty in walking and pain in both hips.Which one of the following is most likely cause?

A 45 year old was given steroids after renal transplant.After 2 years

1.	A 45 year old was given steroids after renal transplant.After 2 years he had difficulty in walking and pain in both hips.Which one of the following is most likely cause?
A.	Avascular necrosis.
B.	Primary Osteoarthritis.
C.	Aluminium toxicity.
D.	Tuberculosis.
Answer» B. Primary Osteoarthritis.