Instruction:
Which of these are not playable races on Dungeons and Dragons 5th edition: Giant, Gnome, Half-Elf, Chimera, Kenku, Troll, Gnoll

Response:
From this list, Giant, Chimera, Troll and Gnoll are not playable races in Dungeons and Dragons 5th edition, although there is a race similar to the concept of giants called Firbolg.