For winter solstice we’re in northern Italy with this photo of what atmospheric phenomenon?

A Lens flare
B Solstice borealis
C Sun halo

Sun halos, sometimes called solar halos, form at high altitudes when the sun’s light passes through ice crystals in the air. The halo can be white, rainbow colors, or even just a partial ring. The halo can form around the moon as well. The full circle halo like this is called a 22° halo.

The correct answer is Sun halo.