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The correct order of ligands arranged in increasing field strength.

1. Cl – < – OH < Br – < CN –
2. F – < Br – < I – < NH 3
3. Br – < F – < H 2 O < NH 3
4. H 2 O < – OH < CN – < NH 3

Correct answer: Br – < F – < H 2 O < NH 3

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