What type of pronoun is the word in bold?

None of the guests had much to eat.

demonstrative

indefinite

relative

interrogative

If the pronoun is "none", it is an "indefinite" (option 2) one. it is commonly used in the plural form and it would mean absence of. for example "none of the garbage was picked up" this would mean that the garbage is still in the same place. It is sometimes considered to be "vague" and not define

"None" is an indefinite pronoun.