Which of the following statement(s) regarding 403(b) plans is true?
1. Assets within a 403(b) plan may be invested in annuities.
2. Assets within a 403(b) plan may be invested in mutual funds.
3. All 403(b) plans must pass the ADP test.
4. In certain situations, a participant of a 403(b) plan can defer an additional $25,000 (catch up) to a 403(b) plan in a single plan year.
