Match List - I with List - II.
| List - I | List - II | ||
| A. | T cells | I. | Foreign bodies, antigens |
| B. | B cells | II. | These cells destroy invaders |
| C. | Natural Killer cells | III. | They produce antibodies |
| D. | Virus | IV. | Cells involved in the fight against both viruses and tumours |
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → A-II, B-III, C-IV, D-I
The white blood cells (leucocytes) of the immune system identify and destroy foreign bodies (antigens) such as viruses. There are several kinds of them.
(A) T cells — this matches (II) These cells destroy invaders. T cells destroy invaders, and T-helper cells increase immunological activity.
(B) B cells — this matches (III) They produce antibodies. B cells produce antibodies.
(C) Natural Killer cells — this matches (IV) Cells involved in the fight against both viruses and tumours. Natural killer cells are involved in the fight against both viruses and tumours; stress can lower their cytotoxicity.
(D) Virus — this matches (I) Foreign bodies, antigens. A virus is one of the foreign bodies (antigens) that the white blood cells identify and destroy.
NCERT (2025-26): “Stress and the Immune System … How does the immune system work? The white blood cells (leucocytes) within the immune system identify and destroy foreign bodies (antigens) such as viruses. It also leads to the production of antibodies. There are several kinds of white blood cells or leucocytes within the immune system, including T cells, B cells and natural killer cells. T cells destroy invaders, and T-helper cells increase immunological activity. It is these T-helper cells that are attacked by the Human Immuno Deficiency Virus (HIV), the virus causing Acquired Immuno Deficiency Syndrome (AIDS). B cells produce antibodies. Natural killer cells are involved in the fight against both viruses and tumours.…” |