MCQ
Product $(X)$ is


- A

- ✓

- C

- D








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$A.$ Chlorophyll - Co
$B.$ Water hardness - EDTA
$C.$ Photography $-\left[ Ag ( CN )_2\right]^{-}$
$D.$ Wilkinson catalyst - $\left[\left(P h_3 P\right)_3 R h C l\right]$
$E.$ Chelating ligand - D - Penicillamine
Choose the correct answer from the options given below: