Answer:
The correct option is "power-driven vessel is approaching head-on"
Explanation:
When you see white, red and green lights, this is to tell you that a power-boat is approaching you head-on, and the best step to take is to give way to your starboard side. It is also advisable that the power-driven vessel also gives way to his starboard side, as this is the required action when you see red, green, and white lights.
