###Rationale: Erlenmeyer flask deformity of lower end of femur is seen in

Gaucher's disease
Lead poisoning 
Thalassemia
Osteopetrosis

###Answer: OPTION D IS CORRECT.
###Question: Erlenmeyer flask deformity of the femur is seen in all of the following, except
###Options:
A. Osteopetrosis
B. Gaucher's disease
C. Thalassemia
D. Paget's disease
