The correct order of acid strength is -

1. A. HClO4 < HClO3 < HClO2 < HClO
2. B. HClO2 < HClO3 < HClO4 < HClO
3. C. HClO4 < HClO < HClO2 < HClO3
4. D. HClO < HClO2 < HClO3 < HClO4

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