The mismatched combinations are

A. Chlorophyll - Co

B. Water hardness - EDTA

C. Photography $$-\left[\mathrm{Ag}(\mathrm{CN})_{2}\right]^{-}$$

D. Wilkinson catalyst $$-\left[\left(\mathrm{Ph}_{3} \mathrm{P}\right)_{3} \mathrm{RhCl}\right]$$

E. Chelating ligand - D-Penicillamine

Choose the correct answer from the options given below :

Among the following compounds, the one which shows highest dipole moment is

2-Methyl propyl bromide reacts with $$\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{O}^{-}$$ and gives 'A' whereas on reaction with $$\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{OH}$$ it gives 'B'. The mechanism followed in these reactions and the products 'A' and 'B' respectively are :