This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Orthopaedics
45-year-old female has history of slip in bathroom complaints of pain right hip, tenderness in scarpas triangle and normal X-ray. Next investigation is: 
Select and explain. 
A. USG guided aspiration, B. CT, C. MRI, D. Bone scan
C: MRI
Answer: C: MRI 
Explanation: (c)This case refers to post-traumatic pain in proximal femur, scarpas triangle refers to area of femoral neck and for stress or occult fracture of neck femur where traumatic marrow edema is seen - MRI is investigation of choice.