The standard hand signal for stopping an approaching driver is to raise one hand (or both) with the palm facing the driver, held up like a “stop” gesture. In a typical multiple‑choice question, the correct option will be the one that says something like:

  • “Raise one arm straight up with the palm facing toward the approaching driver,” or
  • “Hold up one or both hands, palm toward the driver, to signal stop.”

If you see other options like:

  • Waving the arm forward (that usually means “proceed” or “come ahead”), or
  • Moving the arm up and down (often “slow down”),

those would not be the correct description for “stopping an approaching driver.”