The correct answer is **In case of** (Option 4). **Comprehensive Derivation:** The correct answer is - "In case of" Explanation & Key Takeaways: • From the given options, the most appropriate answer is "In case of" as it fits with the context. • Option 2 is incorrect, of never come after despite. • Option 1 'on behalf of' uses when someone represent to other • Eg. The teacher accepted the award on behalf of the whole class. • Option 3 'by means of' uses when someone do something with the help of ... • Eg. He will succeed by means of sheer persistence. • 'In case of' is used to say what we should do if • Eg. The match will be postponed in case of snow. • Thus, Option 4 is correct option. **Option Elimination:** • **Option 1 (On behalf of)**: Incorrect distractor. • **Option 2 (Despite of)**: Incorrect distractor. • **Option 3 (By means of)**: Incorrect distractor. • **Option 4 (In case of)**: Correct Answer; accurate according to canonical reference. **Exam Trap:** Be careful of misleading distractors and subtle terminology differences. Verify core properties before selecting your answer. **Memory Booster:** Core mnemonic rule: In case of corresponds to Option (4).