question: A 20 year old male presents with history of gradual onset pain and swelling in left knee since 6 months. Now since last 1 month patient has staed limping while walking and also has flexion deformity of knee. Ultrasonography shows presence of synol thickening. What is the most probable diagnosis?
opa: Tuberculosis of knee
opb: Pigmented villonodular synovitis
opc: Synol sarcoma
opd: Hemahrosis