Chemistry reduction question

which species could be reduced to form NO2?
A N2O
B NO3
C HNO2
D NO
can someone explain why the answer is B and why not the others

hi

the species needs to be an oxidizing agent, that will be reduced to form NO2 so it needs a higher oxidation number than NO2

oxidation numbers:
NO2=4
N2O=1 ; NO3=6 ; HNO2=3 ; NO=2

so B) must be the answer