###Rationale: Mnemonics for Erlen Meyer Flask Deformity (CHONG) C: craniometaphyseal dysplasias/Pyles disease H: haemoglobinopathies thalassemia sickle cell disease O: osteopetrosis N: Niemann-Pick disease G: Gaucher disease Radiographs showed a nondisplaced fracture and undeubulation of the distal femoral diaphysis -- a condition known as Erlenmeyer-flask deformity.

###Answer: OPTION D IS CORRECT.
###Question: Erlen Meyer Flask Deformity is seen in?
###Options:
A. Osteopetrosis
B. Thalassemia
C. Craniometaphyseal dysplasias
D. All
