When should you not make a U-turn?

• When driving on a curved road
• When on or near railway crossing or hilltop
• When you can’t see at least 150 meters in both directions
• All of the above
  Explanation:

  "To make a U-turn safely, you must have clear visibility in both directions. It is illegal to make a U-turn on a curve near a railway crossing, hilltop, bridge, or tunnel that blocks your view. Never attempt a U-turn unless you can see at least 150 meters in both directions."