In the NO₂^- Ion,each Atom Can Be Viewed as Sp² $\pi$

Multiple Choice

In the NO₂^- ion,each atom can be viewed as sp² hybridized.Thus,each atom has one remaining unhybridized p orbital.How many $\pi$ _2p molecular orbitals (including both bonding and antibonding orbitals) are formed using the unhybridized p orbitals?

A) 1
B) 3
C) 4
D) 6
E) 12