The contraceptive 'SAHELI' is an IUD; is a post-coital contraceptive; blocks estrogen receptors in the uterus, preventing eggs from getting implanted; increases the concentrations of estrogen and prevents ovulations in females.

Saheli is the brand name of the drug ormeloxifene. This is the drug that acts as the selective estrogen receptor modulator. This prevents the action of the hormone on the uterus and the eggs are prevented from getting implanted. Thus, the correct answer is option B.