Answer :
Final answer:
Boutonniere deformity is the correct answer related to a phalanx dislocation or damage, particularly affecting the proximal interphalangeal (PIP) joint of the fingers. So, the best option is b, Boutonniere deformity.
Explanation:
The question pertains to identifying a specific type of finger deformity related to the dislocation or damage of the phalanx, particularly in the context of the distal interphalangeal (DIP) or proximal interphalangeal (PIP) joints.
Among the given options, the one that directly relates to a deformity concerning these joints is Boutonniere deformity.
This condition typically involves the PIP joint of the finger where the middle phalanx is forced downwards, and the distal phalanx is extended.
This is in contrast to the other listed conditions, such as Swan neck deformity which affects both the DIP and PIP but in a different manner, Gamekeeper's thumb which involves the thumb's metacarpophalangeal joint, and Jersey finger which is an injury to the flexor tendon of the finger, not a dislocation or deformation of the phalanges per se.
So, the best option is b, Boutonniere deformity.
