which three elements are in koh?\nkrypton\noxygen\narsenic\nhalfnium\npotassium\nhydrogen

Brief Explanations:

The chemical formula KOH represents potassium hydroxide. 'K' is the symbol for potassium, 'O' for oxygen, and 'H' for hydrogen.

Answer:

B. oxygen, E. potassium, G. hydrogen