Use reasoning to lead to the answer of the following question:
What are molecules that the immune system recognizes as foreign to the physical entity?\nOptions:\n- (A) bacteria\n- (B) proteins\n- (C) antibodies\n- (D) Allergies\n- (E) negative\n- (F) immunities\n- (G) parasites\n- (H) antigens

(H)
Antigens are molecules that the immune system recognizes as foreign to the body.

Bodies are physical entities.

Antigens are molecules that the immune system recognizes as foreign to the physical entity.

.

The final answer: (H)