This is the teacher ......... told me my son has been misbehaving in class

[Englishlearner]

This is the teacher ......... told me my son has been misbehaving in class. (*) which (*) whose (*) whom (*) who

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This is a companion discussion topic for the original entry at https://english.best/questions/1914,this-is-the-teacher-___-told-me-my-son-has-been-misbehaving-in-class/

[Shanthisethuraman]

This is the teacher … who… told me my son has been misbehaving in class.