<prompt> Swan neck deformity is:Hyperextension at DIP, Flexion of PIPExtension of DIP, Hyperflexion at PIPExtension of both DIP PIPFlexion at DIP, Hyperextension at PIP  <response>: Deformities of RA - Swan Neck Deformity - Flexion at DIP and hypeension at PIP - Flexor insufficiency of PIP - Boutonniere deformity Button hole deformity - Extensor deficiency at PIP joint - Hypeension of DIP Flexion of PIP - Z deformity of thumb - Ulnar detion of fingers Z-deformity of thumb 