Which of the following is the most unstable r | vedclass

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(C) To determine the stability of resonating structures,we consider the following rules:$1$. Structures with more covalent bonds are more stable.$2$.

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(C) To determine the stability of resonating structures,we consider the following rules:$1$. Structures with more covalent bonds are more stable.$2$. Structures with complete octets for all atoms are more stable.$3$. Structures with negative charge on more electronegative atoms and positive charge on less electronegative atoms are more stable.$4$. Structures with less charge separation are more stable.In the given structures,all are carbocations. We compare the stability of the carbocation based on the position of the positive charge relative to the double bonds and the alkyl group. Structure $A$ has the positive charge at the allylic position relative to the methyl group and the double bond. Structure $B$ and $C$ have the positive charge at different positions. By analyzing the resonance,structure $C$ has the positive charge at a position where it is less stabilized by the inductive effect of the methyl group compared to the others,or it represents a structure where the charge is further from the electron-donating group. However,in this specific set of resonance structures for a methyl-substituted cyclohexadienyl cation,structure $C$ is the least stable because the positive charge is furthest from the stabilizing effect of the methyl group.

Which of the following is the most unstable resonating structure?

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Choose the correct answer from the options given below :

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