Which of the following substituents deactivates the benzene ring towards electrophilic substitution?

Which of the following froups groups deactivates the benzene ring towards electrophilic substitution ?

Which of the following group(s) activate the benzene ring towards electrophilic substitution reaction.

Which of the following is less reactive than benzene towards electrophilic substitution reaction ?

Which of the following groups is o-p directing but deactivates benzene ring for electrophilic substitution?

Which one of the following is benzene ring deactivating group towards electrophilic substitution ?