what letter(s) does the letter “z” change two at the end of a plural noun?

Question

for example: la nariz—> las nari ___
a the letter Z changes to S
b the letter Z changes to ces
c the letter Z changes to ies
d the letter Z does not change in the plural

Answer 1

The correct answer is b) the letter Z changes to ces.

In Spanish, when a noun ends in "z," the "z" changes to "ces" when forming the plural. For example, "la nariz" (the nose) becomes "las narices" (the noses) in the plural form.