Which of the following is a correct pair of singular and plural?

Storey:Storeys

The correct pair of singular and plural is:

☀ Storey:Storeys

Explanation for each option:

☀ Storey:Storeys: This is correct. The singular form of "Storey" is "Storey," and the plural form is "Storeys" (or "Stories" in some regions).

☀ Stomach:Stomaches: This is incorrect. The correct plural form of "Stomach" is "Stomachs."

☀ Monarch:Monarches: This is incorrect. The correct plural form of "Monarch" is "Monarchs."

☀ Reef:Reef: This is incorrect. The plural form of "Reef" is "Reefs."