An elderly female presented with history of bilateral hand stiffness that is worse in the morning. On examination she had bony swellings in the distal interphalangeal joints

An elderly female presented with history of bilateral hand stiffness that is worse in the morning. On
examination she had bony swellings in the distal interphalangeal joints. These swellings are:
a) Heberden nodule
b) Buchard's nodule
c) Synovial thickening
d) Synovial cysts.