# The increasing order of the

Question:

The increasing order of the $\mathrm{pK}_{\mathrm{b}}$ of the following compound is :

1. $(\mathrm{A})<(\mathrm{C})<(\mathrm{D})<(\mathrm{B})$

2. $(\mathrm{B})<(\mathrm{D})<(\mathrm{A})<(\mathrm{C})$

3. $(\mathrm{C})<(\mathrm{A})<(\mathrm{D})<(\mathrm{B})$

4. $(\mathrm{B})<(\mathrm{D})<(\mathrm{C})<(\mathrm{A})$

Correct Option: , 2

Solution: