Swan neck deformity -
Ans. is 'd' i.e., Extention at PIP and Flexion at DIP joint * Boutonniere deformity: Flexion contracture of PIP joint and extension of DIP joint.* Swan neck deformity: Hyperextension of PIP joint and flexion at DIP joint.
Flexion at PIP and DIP joint
Extention at PIP and DIP joint
Flexion at PIP and Extention at DIP joint
Extention at PIP and Flexion at DIP joint
Arthritis