Option 1 -> obscure means unclear or hidden; not an antonym of devious.
Option 2 -> straightforward means honest and direct; the opposite of devious (dishonest/cunning).
Option 3 -> devilish means wicked or mischievous; similar to devious, not opposite.
Option 4 -> diverting means entertaining or amusing; unrelated to the meaning of devious.
Hence, Option 2: straightforward -> "Devious" describes dishonest, cunning, or indirect behavior, while "straightforward" describes honest, direct, and uncomplicated behavior, making them perfect antonyms. -> correct