The correct sequence of ligands in the order of decreasing field strength is:

Question

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Strategy:
 The field strength of ligands is determined by the spectrochemical series, which ranks ligands based on the magnitude of crystal field splitting () they produce.

Step 1: Recall the Spectrochemical Series
The decreasing order of ligand field strength is:

Step 2: Compare the given options
In the correct sequence,  (a strong -acceptor) is the strongest, followed by , then halides/sulfides which are weak field ligands.

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