A.
Muscle up 5 x max reps

or

Four rounds:

Ring dips max reps 30s
30s Rest
Strict pull-up max reps 30s
30s Rest

B.
In teams of two, alternate full rounds to complete as many rounds and reps as possible in 12 minutes of:
9 Burpee Box Jump-Overs (24″/20″)
9 Front Squats (155/105 lbs)
18 Double unders or Lateral jumps over bar