State the nature of the word "WHICH" in the following sentence. WHICH is the mail train? Interrogative Pronoun Interrogative adjective Demonstrative Pronoun Demonstrative Adjectives Share with your friends Share 0 Roshini Anie Thomas answered this Dear Student In the above sentence, which is an interrogative pronoun. Regards. -1 View Full Answer Abhyanshu Kumar answered this In this sentence, WHICH is interrogative pronoun 1