JEE Previous Year Question

Among the following, total number of meta directing functional groups is (Integer based)
$-{\text{OCH}}_3\text{,}-{\text{NO}}_2\text{,}-\text{CN}\text{,}-{\text{CH}}_3-{\text{NHCOCH}}_3\text{,}-\text{COR}\text{,}-\text{OH}\text{,}-\text{COOH}\text{,}-\text{Cl}$

Topic: JEE PYQ

Answer: 4. Full step-by-step solution below.