MCQ
About how long ago was the earth formed
- ✓$4.5$ billion years ago
- B$10$ billion years ago
- C$3.0$ billion years ago
- D$20$ billion years ago
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$I$. Pills prevent ovulation during use as contraception technique
$II$. Copper$-T$ prevents implantation
$III$. Vasectomy produces semen containing no sperm