Erlenmeyer flask deformity of the femur is seen in all of the following, except: (A) Osteopetrosis, (B) Gaucher's disease, (C) Thalassemia, (D) Paget's disease
Answer is D. Erlenmeyer flask deformity of lower end of femur is seen in

Gaucher's disease
Lead poisoning 
Thalassemia
Osteopetrosis