Question

which term shows the correct use of the combining vowel? gastrscopy gastroscopy

Explanation:

In medical terminology (under Natural Science - Medicine and Health), a combining vowel (usually "o", "i", etc.) is used to connect word parts when the first part ends with a consonant and the next part starts with a consonant. "Gastroscopy" uses "o" as a combining vowel between "gastr" (root) and "scopy" (suffix), while "gastrscopy" lacks the combining vowel, making it incorrect.

Answer:

gastroscopy