If you mark those points on the phase diagram it appears to be moving from vapor to liquid. If you can’t see how I determined that please let me know and I can further explain.
Vapor to liquid is the same as saying gas to liquid, which I believe to be the correct answer.
Sleet is formed when water droplets fall through a cold layer of air. Freezing rain, on the other hand, is water droplets that freezes upon contact with a solid surface.
