STD 12 - 8. microbes in human welfare — BIOLOGY STD 12 Science — Question

$I$. Pills prevent ovulation during use as contraception technique

$II$. Copper$-T$ prevents implantation

$III$. Vasectomy produces semen containing no sperm

$(1)$ medical termination of pregnancy $(MTP)$ during first trimester is generally safe

$(2)$ generally chances of conception are nil until mother breast feeds the infant upto two years

$(3)$ intrauterine devices like copper $T$ are effective contraceptives

$(4)$ contraception pills may be taken upto one week after coitus to prevent conception.

Which two of the above statements are correct?