Where are the vocal cords found?

If a tiny particle is placed in the pore of a stoma,what will happen?

Diaphragm is found in

The portion of the vestibule between the true and false vocal cords is known as:

Given below are two statements regarding the respiratory system of man.
$Statement-I$: Epiglottis prevents the entry of food into the trachea.
$Statement-II$: The internal lining of the trachea is made up of ciliated epithelium only.
In the light of the above statements, choose the most appropriate answer from the options given below:

At which level of thoracic vertebra does the trachea divide?