7. Alcohol, phenol and ethers — Chemistry STD 12 Science — Question

(Rounded-off to the nearest integer) $\left[ K _{ b }=0.52 \,K \,kg\, mol ^{-1}\right]$

$A.\,\,F -CH_2\,\,CH_2\,\,COOH$

$\begin{array}{*{20}{c}}
  {B.\,\,Cl - CH - C{H_2} - COOH} \\ 
  {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {\,\,Cl\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} 
\end{array}$

$C.\,\,F -CH_2 -COOH$

$D.\,\,Br -CH_2-CH_2 -COOH$

Correct answer is