Answer: Tuberculosis.
- A Malaria
- B Typhoid
- C Tuberculosis
- D Cholera
Correct answer: C. Tuberculosis
Explanation: BCG (Bacille Calmette-Guerin) is a live attenuated vaccine against Mycobacterium tuberculosis (TB). It is one of the most widely used vaccines globally. It provides 70-80% protection, especially in children.
An antibody is Y-shaped, with two identical antigen-binding sites at the tips of the variable regions - each shaped to recognise one specific antigen - while the constant (Fc) region at the base is recognised by immune cells to trigger further responses.
Concept context
Innate and adaptive immunity, B cells, T cells, antibodies, vaccines, and immune disorders. Critical for NEET.