STD 12 - 13. biodiversity and conservation — BIOLOGY STD 12 Science — Question

$I$. 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

$I.$ use of biofertilisers and biopesticides

$II.$ crop rotation

$III.$ locally developed pest resistant varieties

Choose the correct option