Based on the three-cell model of global circulation, surface winds diverge in the vicinity of o the polar front o subpolar lows o the equator o the north and south poles

The problem here is that according to aufbau principle before 3d orbital 4s subshell comes.after filling 3p orbital with electrons you have 4 electrons left, you place two in 4s with opposite spin and the other two in 3d in any of its two orbitals of total five orbitals with the same spin.

Ido not understand. 

H tricky one let me think and get back to u