Among the following solar terms, the northernmost position of the wind belt in the pressure belt on the earth is () A. Spring equinox B. Summer solstice C. Autumn equinox D. Winter solstice.

A, on the vernal equinox, the direct point of the sun is on the equator, so it doesn't meet the question;

B, when the direct point of the sun is in the northernmost position, the position of the pressure belt wind belt also moves to the northernmost position. The northernmost position of the sun's direct point is the Tropic of Cancer, that is, June 22 from summer to Sunday, so the position of the global pressure belt wind belt is the northernmost from summer to morning, so it is correct;

C, the autumnal equinox, the direct point of the sun is at the equator, so it does not meet the meaning of the question;

D from winter to the sun, the direct point of the sun is on the tropic of Capricorn, which does not meet the meaning of the question.

Therefore, choose: B.