This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Arthritis, Subject name: Orthopaedics
[{'content': 'Thomas test helps to detect - \nSelect and explain. \nA. Adduction deformity of the hip, B. Integrity of the Abductor Mechanism, C. Fixed flexion deformity of the Hip, D. Apparent shortening at the hip Joint', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Fixed flexion deformity of the Hip Tests for Hip JointTESTINDICATIONTHOMASFixed flexion DeformityTrendelenburg TestFailure of the Abductor MechanismBryants TriangleSupratrochanteric ShorteningSquaring of pelvisAdduction/Abduction DeformityTelescoping TestPositive in DDH, transcervical neck femur fractureNelatons LineSupratrochanteric ShorteningChienes testSupratrochanteric ShorteningShoemakers LineSupratrochanteric Shortening", 'role': 'assistant'}]