How do the pills work? i) Inhibit ovulation and implantation ii) Alter the quality of cervical mucus to prevent or retard the entry of sperms iii) Prevent the ejaculated semen from entering the female vagina iv) Inhibit spermatogenesis

Options

A. (i), (ii) and (iii)
B. (i) and (ii)
C. (ii), (iii) and (iv)
D. (iii) and (iv)

Answer

B