Multiple choice general knowledge science & technology

The immune system protects against:

  1. Allergies

  2. Isotopes

  3. Antigens

  4. Antibodies
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The immune system protects the body against antigens, which are foreign substances like bacteria, viruses, or toxins that trigger an immune response. Allergies are hypersensitive immune reactions to harmless substances, isotopes are variants of chemical elements unrelated to immunity, and antibodies are proteins produced by the immune system to fight antigens (not what the system protects against).

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