Which of the following base is weakest ?

Options

A. `NH_(4)OH :K_(b)=1.6xx10^(-6)`
B. `C_(6)H_(5)NH_(2), K_(b)=3.8xx10^(10)`
C. `C_(2)H_(5)NH_(2), K_(b)=5.6xx10^(-4)`
D. `C_(9)H_(7)N , K_(b)=6.3xx10^(-10)`

Answer

B

Explanation

Lower the value of `K_(b)` , weaker is the base