Match the following columns (types of WBC with their functions) and select the correct option. List I (WBC) A. Eosinophils B. Basophils C. Neutrophils D. Lymphocytes List II (Function) i. Immune responses ii. Phagocytosis iii. Secrete histamine and heparin (inflammation) iv. Resist infections; associated with allergic reactions Choose the correct answer:
Answer: (A) A-iv, B-iii, C-ii, D-i. Answer: (a) A-iv, B-iii, C-ii, D-i Solution: Eosinophils (2-3%) resist infections and are associated with allergic reactions; basophils secrete histamine, serotonin and heparin and are involved in inflammatory reactions; neutrophils are the most abundant phagocytic cells; B- and T-lymphocytes carry out the body's immune responses.
- A.A-iv, B-iii, C-ii, D-i✓
- B.A-i, B-ii, C-iii, D-iv
- C.A-ii, B-iv, C-i, D-iii
- D.A-iii, B-i, C-iv, D-ii
Correct Answer
(A) A-iv, B-iii, C-ii, D-i
Solution & Explanation
Answer: (a) A-iv, B-iii, C-ii, D-i Solution: Eosinophils (2-3%) resist infections and are associated with allergic reactions; basophils secrete histamine, serotonin and heparin and are involved in inflammatory reactions; neutrophils are the most abundant phagocytic cells; B- and T-lymphocytes carry out the body's immune responses. NCERT: Ch 15, p.194-195, 15.1.2 Formed Elements — "Lymphocytes ... are responsible for immune responses of the body"; eosinophils "associated with allergic reactions". (Note: this item is reproduced from NEET 2020, whose source PDF had an OCR-corrupted List II; the columns and key above are reconstructed to the NCERT-correct WBC functions.)