Plural of 'mouse'.

**The reasoning** "Mouse" is an **irregular plural noun** in English. Unlike regular nouns where you just add *-s* or *-es* (like cat→cats, box→boxes), some English nouns change their internal vowel sound or spelling completely when becoming plural. **Mouse → Mice** follows the same ancient pattern as: - Foot → Feet - Tooth → Teeth - Goose → Geese This vowel-change pattern comes from Old English and has survived in modern English. There's no formula here — you simply have to memorize these irregular forms. **Why the wrong options tempt you** **A) Mouses** — This feels logical because most English plurals just add *-s*. But "mouse" doesn't follow that rule. **C) Meeses** — This is completely made up (perhaps from cartoon humor, like "moose→meese"). Not a real word. **D) Mouse** — Some nouns stay the same in plural (sheep→sheep), but "mouse" isn't one of them. **Quick takeaway** When you see foot/tooth/goose, think of their "ee" twins: feet/teeth/geese/mice — irregular plurals that change vowels, not add letters.