For the question, choose the most appropriate stress pattern from the options. The stressed syllables are written in capital letters.
Grammarian
Answer Details
The word grammarian has four syllables: gram-MA-ri-an. The primary stress falls on the second syllable: /ɡrəˈmeəriən/.
This follows the common English stress rule for words ending in the suffix "-arian" (like "librarian," "vegetarian," "humanitarian"). In these words, the stress typically falls on the syllable immediately before "-arian" - but since "-arian" itself starts with a stressed syllable in some patterns, the result for "grammarian" is stress on "-MA-."
Stressing the first syllable (GRAmmarian), the third (grammaRIan), or the fourth (grammariAN) would produce unnatural pronunciations that do not match standard English.