<prompt> The deformity of tibia in triple deformity of the knee is?Extension, Posterior subluxation external rotationFlexion, posterior subluxation external rotationFlexion, posterior subluxation internal rotationExtension, Anterior subluxation internal rotation  <response>: Flexion, posterior subluxation external rotation REF: Apleys 8th ed p. 42 Triple deformity of knee consists of flexion, posterior subluxation of tibia and external rotation of tibia Treatment: ATT, Ahrodesis Causes: TB, Rheumatoid ahritis 