Are there any rules or conventions on when to omit を (as in 1) or が (as in 2) when it comes to embedded questions?

  1. この生物は何か教えてください。
  2. どれがおいしいかまずいかさっぱりわかりません。

My gut feeling would be to generalize and say that the particles are mostly dropped in spoken /more casual language and kept in written/ more formal language, but honestly I feel like I've seen them dropped relatively frequently even in written language so I am unsure... Any thoughts?

  • 2
    Just to clarify: you are talking about the particles here that would/could attach to the embedded questions (I.E. if you were to add them they would be adjacent to か) and not particles inside the embedded questions, right? – Mindful Jan 15 at 4:12
  • @Mindful yes! It seems that this was a duplicate question -- thank you Chocolate, for finding it ! – Daphne Jan 15 at 17:09