Solar term termination line

In the picture, the terminator line is tangent to the polar circle at point P, which is Saturday in London and Sunday in Beijing. When London time is 0 meridian, 0 meridian and 180 longitude form a warp coil. It's a new day to go east from 0 meridian to180 meridian, so it's 0 meridian and 40 meridian when forming warp coil with point P.

Therefore, choose: B.