Question: The increasing order of the $\mathrm{pK}_{\mathrm{b}}$ of the following compound is :
$(\mathrm{A})<(\mathrm{C})<(\mathrm{D})<(\mathrm{B})$
$(\mathrm{B})<(\mathrm{D})<(\mathrm{A})<(\mathrm{C})$
$(\mathrm{C})<(\mathrm{A})<(\mathrm{D})<(\mathrm{B})$
$(\mathrm{B})<(\mathrm{D})<(\mathrm{C})<(\mathrm{A})$
Correct Option: , 2
Solution:
