1.

Which of the following represent N, molecules

Answer»

`UNDERSET(""_(X)^(X )N-=N_(X)^(X))`
`underset(XX)OVERSET(XX)N-=underset(XX)overset(XX)N`
`underset(XX)overset(XX)N-=underset(XX)overset(XX)N`
`""_(X)^(X)underset(XX)overset(XX)N-=underset(XX)overset(XX)(" "N_(X)^(X))`

ANSWER :A


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