<prompt> Single pelvic ala is seen inRobes pelvisNaegeles pelvisOsteomalacia pelvisRickets pelvis  <response>: Naegeles pelvis - Ala on one side is absent Robes pelvis - Ala on both sides are absent Osteomalacic pelvis - the shape of inlet is triradiate Rachitic pelvis - shape of inlet is reniform 