<prompt> Triple deformity of knee includes following except?Flexion of kneeExternal rotation of tibiaPosterior subluxation of tibiaExtension of knee  <response>: Ans. is d i.e., Extension of knee Triple deformity of knee refers to : - Flexion of knee External rotation of tibia Posterior subluxation of tibia Triple deformity is seen in RA, TB of knee and Polio. 