Question

which term shows the correct use of the combining vowel? hysterical hysteroical

Explanation:

In medical terminology (and relevant language/etymology contexts), a combining vowel (usually "o" or "i") is used to connect word parts when the first part ends with a consonant and the next part starts with a consonant. The root "hyster-" (relating to the uterus) when combined with another word part, if needed, uses a combining vowel. However, "hysterical" is the correct spelling (from "hyster-" + "-ical", no extra combining vowel error here? Wait, no—wait, maybe the question is about word - building with combining vowels. Wait, actually, "hysterical" is the standard term. "hysteroical" is incorrect as it has an unnecessary combining vowel (the root "hyster - " + " - ical" doesn't need the "o" as a combining vowel here; the correct term is "hysterical".

Answer:

A. hysterical