This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
Waddling gait due to: March 2009 
Select and explain. 
A. Bilateral congenital dysplasia of hip, B. Coxa valga, C. CTEV, D. Bilateral coxa valgum
A: Bilateral congenital dysplasia of hip
Answer: A: Bilateral congenital dysplasia of hip 
Explanation: Ans. A: Bilateral congenital dysplasia of hip A waddling gait is the style of walking that is seen in a patient with proximal myopathy. It is characterised by: A broad-based gait with a duck-like waddle to the swing phase The pelvis drops to the side of the leg being raised Forward curvature of the lumbar spine Marked body swing This gait may be seen in patients with bilateral congenital hip dislocation and pregnancy.