Model Paper 8 — NEET STD 11 Science — Question

Statement $I$ : Bone marrow is the main lymphoid organ where all blood cells including lymphocytes are produced.

Statement $II$ : Both bone marrow and thymus provide micro environments for the development and maturation of T-lymphocytes.

In the light of above statements, choose the most appropriate answer from the options given below :

$R -$ Blood drained from a convenient artery is pumped into dialyzing unit after adding anti heparin.

$I$. Ovulation do not occur during the lactational period

$II$. Chances of the failure of contraception are almost nil upto six months following parturition

$III$. Side effects are almost nil

$IV$. It is a natural method of contraception

$V$. It increases phagocytosis of sperms