Read the sentences and complete the rules below.

Leo got three postcards and I got none. = Leo got three postcards, and I didn't get any postcards.

None of my classmates has been to London. = Any of my classmates hasn't been to London.

Choose the correct option.

None cannot be used [before a noun|instead of a noun].

None of can be used [before a noun|instead of a noun].

None (of) is not used in the sentences with [positive|negative] verbs.