The symbol for resonance is

Options

A. `harr`
B. `hArr`
C. `=`
D. `rarr`

Answer

A

Explanation

We represent ozone molecule by using two Lewis structures:
`overset(..)underset(..)O=overset(+)underset(..)O-overset(..)underset(..)O:^(-)harr^(-) :overset(..)underset(..)O-overset(..)underset(+)O=overset(..)underset(..)O`
The symbol `harr` indicates that the structures shown are resonance structures.