" Since "them" is an objective pronoun, we will go for 'whom'. Correct. Nevertheless, when the preposition is left at the end, it is also OK to use 'who' in less formal situations.
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Huzaifa AsifFor me, it's the former one because when we ask ourselves, "You are talking about 'them'." Since "them" is an objective pronoun, we will go for 'whom'.Correct. Nevertheless, when the preposition is left at the end, it is also OK to use 'who' in less formal situations.