This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Injuries Around Hip, Subject name: Orthopaedics
Pseudoflexion deformity of hip is seen in? 
Select and explain. 
A. Iliopsoas abcess, B. Tom smith arthritis, C. Rickets, D. Posterior dislocation of hip
A: Iliopsoas abcess
Answer: A: Iliopsoas abcess 
Explanation: ANSWER: (A) Iliopsoas abcessREF: Tuberculosis by tuli 3rd e p. 193Psoas abscess gives rise to pseudo hip flexion deformity, due to spasm of the illiopsoas muscles .ipsilateral flexion of hip joint relieves the pain and extension increases it.