question: What changes the color of litmus paper from blue to red?
choices.text: keratin HIV complex moles A snake lemon toxins adding
choices.label: A B C D E F G H
formatted_question: What changes the color of litmus paper from blue to red? (A) keratin (B) HIV (C) complex (D) moles (E) A snake (F) lemon (G) toxins (H) adding