Which of the following pairs of Lewis structure represent resonance contributor to the species?

Options

A. `underset(and)(H-underset(H)underset(|)(C )=overset(ddot)(N)-N " " H-overset(ddot)(C )=underset(H)underset(|)overset(+)(N)-H)`
B. `underset(and)(H-underset(H)underset(|)(C )=overset(ddot)(N)-H " " H-underset(H)underset(|)overset(+)(C )-underset(ddot)overset(-)(N)-H)`
C. `underset(and)(H-underset(H)underset(|)overset(H)overset(|)(C )=overset( :O: )overset(||)(C )-H " "H-overset(H)overset(|)(C )=overset( :O:-H )overset(|)(C )-H`
D. `underset(and)(H_3C-CH_2-underset(ddot)overset(ddot)(O)-H " "H_3C-underset(ddot)overset(ddot)(O)CH_3`

Answer

B