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The set which does not have ambidentate ligand(s) is :

1.  2 4 2 O C , ethylene diammine, H 2 O
2. EDTA 4– , NCS – ,  2 4 2 O C
3.  2 NO ,  2 4 2 O C , EDTA 4–
4.  2 4 2 O C ,  2 NO ,  NCS

Correct answer:  2 4 2 O C , ethylene diammine, H 2 O

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