What are molecules that are recognized by the body as alien?\nOptions:\n- (A) parasites\n- (B) Acids\n- (C) heat or cold\n- (D) negative\n- (E) antigone\n- (F) antibodies\n- (G) antigens\n- (H) blood cells OK. Let's think hard:
User
Antigens are molecules that the immune system recognizes as foreign to the body. Yes, foreigners are called Aliens. Antigens are molecules that the immune system recognizes as alien to the body.
So, the final answer is (G).
Assistant