Orthopaedics Joint Disorders 0c3210af Boutonniere deformity involves: A Flexion at PIP and DIP joint B Extention at PIP and DIP joint C Flexion at PIP and extention at DIP joint D Extention at PIP and flexion at DIP joint High-Yield Explanation Boutonniere deformity involves: Flexion at PIP and extention at DIP joint seen in RA Other deformities in RA- Swan-neck deformity Z-deformity of thumb Ulnar detion of fingers