Select the $CORRECT$ identification group of labelled parts $I, II, III$.

The Organ of Corti is found in:

$P$ is a continuous tubular structure. Inside these tubes, $Q$ is arranged.
$\quad\quad\quad P \quad\quad\quad Q$
$(A)$ $Scala \text{ vestibuli} \quad$ $Scala \text{ media}$
$(B)$ $Scala \text{ media} \quad$ $Scala \text{ tympani}$
$(C)$ $Scala \text{ tympani} \quad$ $Scala \text{ media}$
$(D)$ $Scala \text{ media} \quad$ $Scala \text{ vestibuli}$

The $Malleus$ is present in the:

The following figure shows a cross-section of the cochlea. Identify the canals labeled $P$,$Q$,and $R$.

The canal joining the middle ear with the buccal cavity is: