In Kent's Repertory, the location of a boil in the perineum would be found under the chapter corresponding to the anatomical region. The perineum is the region between the genitals and the anus. Therefore, the most appropriate chapter to look under would be the one related to the rectum and anus, as the perineum is closely associated anatomically.
Within the "Rectum" chapter (or a similarly named section encompassing the perineal region), skin eruptions like boils are generally listed under "Eruptions." Following the general-to-specific principle of repertory organization, the arrangement would likely be:
Rectum – Eruption – Perineum – Boil
Let's examine why the other options are less likely:
\begin{itemize}
\item Skin, Eruption, Boils, Perineum: While boils are skin eruptions, a specific location like the perineum would typically be sub-located under the relevant anatomical chapter rather than just "Skin."
\item Skin, Boils, Perineum, Eruption: The hierarchy of "Eruption" usually comes before the specific type of eruption ("Boils") or location.
\item Genitalia – Eruption, Boils, perineum: While the perineum is close to the genitalia, Kent's Repertory would likely have a more specific rubric under "Rectum" or a section covering the perineal area.
\end{itemize}
Therefore, the most logical arrangement in Kent's Repertory for a boil in the perineum would be found under the anatomical location ("Rectum" or related), followed by the general symptom ("Eruption"), the specific location within that chapter ("Perineum"), and then the type of eruption ("Boil").