Oropharynx

Q.

Identify the parts 1., 2. and 3.; choose the correct option indicating the parts :

1. 1.$\Rrightarrow$ Laryngopharynx, 2.$\Rrightarrow$ Nasopharynx, 3.$\Rrightarrow$ Nasopharynx
2. 1.$\Rrightarrow$Oropharynx, 2.$\Rrightarrow$Laryngopharynx, 3.$\Rrightarrow$Nasopharynx
3. 1.$\Rrightarrow$Nasopharynx, 2.$\Rrightarrow$Oropharynx, 3.$\Rrightarrow$Laryngopharynx

4. 1.$\Rrightarrow$ Nasopharynx, 2. $\Rrightarrow$ Esopharynx, 3. $\Rrightarrow$Buccopharynx

Q. __ is the cartilaginous structure which prevents the entry of food into the trachea.