"Apakah pelajaran kamu suka"...?
I get where you're coming from but... no, that's not right
I would say "yang mana pelajaran kamu suka?" or "Apakah pelajaran kamu paling suka?"
(Apakah like a word which informs the listener that the following sentence is a question)
Is the sentence part after “yang” in the passive type 2 form ? For instance if the sentence would have been “What animal do you see” the translation would be “Hewan apa yang kamu lihat” and not “hewan apa yang kamu melihat”?