Which of the following statements is incorrect?

1. A. Of - O -C + O , O=C=O , the structures, - O -C + O is most stable structure
2. B. The bond angle follows the order CH4 > NH3 > H2O > H2S
3. C. The bond order follows the order O2 + > O2 > O2 - > O2 2-
4. D. Strength of ‘H’ bond follows the order HF > H2O > NH3 > HCl

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