MCQ
Choose incorrect one.
- ANasal chamber opens into nasopharynx
- ✓Larynx is bony box
- CDuring swallowing epiglottis to prevent the entry of food into the larynx.
- DTrachea is divides at the level of $5^{th}$ thoracic vertebra.
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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