MCQ
Among the following, total number of meta directing functional groups is__________ (Integer based)
$ -\mathrm{OCH}_3,-\mathrm{NO}_2,-\mathrm{CN},-\mathrm{CH}_3-\mathrm{NHCOCH}_3, $
$ -\mathrm{COR},-\mathrm{OH},-\mathrm{COOH},-\mathrm{Cl}$
- A$3$
- B$2$
- ✓$4$
- D$1$