The order of relative stability of the contributing structure is:

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Canvas Classes · Accepted Answer

Step 1: Evaluating Resonance Contributor Stability
Stability of contributing structures follows these general rules:
1. Neutral structures are more stable than charge-separated ones.
2. Structures with complete octets are more stable.
3. Structures with more covalent bonds are more stable.

Step 2: Comparison
Structure (I) is neutral, whereas structure (II) involves charge separation (positive and negative charges on different atoms). Thus, structure (I) is much more stable.

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