Question

Which of the following statements are incorrect?
(i)Leucocytes disintegrate in spleen and liver.
(ii)RBCs, WBCs and blood platelets are produced by bone marrow.
(iii)Neutrophils bring about destruction and detoxification of toxins of protein origin.
(iv)Important function of lymphocytes is to produce antibodies.

• A. i and ii
• B. i and iv
• C. i and iii
• D. ii and iii

Answer 1

Answer: (C)

i and iii

RBCs or erythrocytes are disintegrated in the spleen and liver after a time period of 120 days, since WBCs are immunological cells their life span depends on their recruitment to fight infections, generally from 8-10 days. Neutrophils are phagocytic in nature and control infection by moving to the site of infection and engulfing and digesting the pathogen.

So, the correct answer is 'i and iii'