When performing an addition or subtraction calculation, significant figures in the calculated result are dictated by the of the measured numbers. The calculated result should have the measured number in the calculation with the fewest

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.

The think of process to make something successful

Ithink the answer is b.